Why wouldn't someone be better at Blitz than Daily chess? Whatever logic you apply to one person would also apply to their opponents anyway - i.e. if I make more mistakes in Blitz so does my opponent. I don't put much more effort into my Daily games anyway though - they are just something I play a move in each day or whenever. Some times a position interests me and I spend longer, but not otherwise.
How can you have higher Blitz than your Daily?

i like to finish a game in one sitting
i also have a tendency to rush more in daily; especially when i would awaken from a notification about the game and make a move in half sleep mode because i couldnt handle waiting

The rating has nothing to do with the time control, just how well you play against a pool of players in that time discipline.

@glamdring27 because you play both type of chess with your 'very same' knowledge and you should play better when you play slowly. so you can go deeper in variations, make better plans. and you are less likely to blunder and have to change your plans.
So can your opponents.
@glamdring27 because you play both type of chess with your 'very same' knowledge and you should play better when you play slowly. so you can go deeper in variations, make better plans. and you are less likely to blunder and have to change your plans.
You have made that one assumption that a player would stay on the board for some time to analyse a position.
In practicality, a small proportion of these players play daily chess just to relax their mind at the end of a day. They may just take five or 10 minutes to look at a position, then make a move, before continuing on their other errands for the day. And there are those who also play many simultaneous daily games as well, thus not devoting their time to a single position only.
Time management and pressure partly contribute to a greater rate of blunders at the blitz setting.
Personally I do not play daily games. I prefer a game to end within the same day, even if it would take more than one hour to complete in an over the board game.

@glamdring27 because you play both type of chess with your 'very same' knowledge and you should play better when you play slowly. so you can go deeper in variations, make better plans. and you are less likely to blunder and have to change your plans.
In theory, but as I said, that also applies to my opponent in either discipline. In actual fact I play most moves very quickly in Daily chess.
Also there is much better flow in a Blitz game because you play the whole game in one sitting. For Daily games you have to pick up the position again a day or more later often and understand it again and remember what you were thinking last time (or make notes which I'm too lazy to do).
As it happens, my Daily rating is a little higher than my Blitz, but within variance they are pretty similar.

@glamdring27 because you play both type of chess with your 'very same' knowledge and you should play better when you play slowly. so you can go deeper in variations, make better plans. and you are less likely to blunder and have to change your plans.
I don’t think you understand what ratings actually measure.

When I play 10 minutes blitz games, I play chess only and nothing else. When i play Daily, I multitask browsing Instagram, watching YouTube, reading yahoo.com or CNN. I can't focus on Daily games where in blitz I'm forced to focus.

To be honest I sometimes do that in 10 minute Blitz games too I also usually play my 10 minute Blitz games while I eat my lunch, at work (in normal times), which gives extra distractions too!

You seem to be under the weird impression that a chess rating measures your playing strength. It doesn't. It measures your results against a specific pool of players... the ones that you've played in order to gain that rating.
So if the pool of opponents that you've played is not the same in Blitz as it is in Daily, you can't compare the two ratings (well, you CAN, but the result is meaningless).
Even if the opponents were identical, the rating does not measure how good your moves were. It measures ONLY your results... wins, draws and losses. So asking why you are "playing better" at Blitz than at Daily is silly. You aren't. With less time to think, you are playing worse. But your opponents ALSO have less time to think, and they are ALSO playing worse.
It's a question of who can make the worse moves, not who can make the BETTER moves.

I assume you meant to quote the original poster there as my post had nothing to do with what you said!

I assume you meant to quote the original poster there as my post had nothing to do with what you said!
Yes, my bad. Fixed now.

Also, a lot of people will have their ratings drop due to a bunch of time outs. Something could happen where they cant get online to make their moves & they'll lose games that way. I've seen players have dozens of games going & lose on time dropping a huge amount of rating points.
Yeah, I lost a bunch of points that way, when I moved to a different town for a new job and couldn't get Internet connected right away.
Lots of folks play their "Daily" games almost as fast as they do blitz or bullet. When they're paired against traditional "try to craft a masterpiece every game" correspondence players, they naturally don't do that well. And of course some folks have a few hundred games going at once so they can't spend much time on any one game. Of course very experienced blitz players have an array of tricks and traps that they use as well. My $.02...