Why do i play better against strong players and not lower rated players

Why do i i just lost to a 1300, and two or three days ago i beat a 1700. why is this?

I have no Idea... Maybe they make over sights.. or their making human errors.. Those Low rated players are scrappy! 

Sometimes the rating is not accurate.  Check how many games they've played.

Sometimes the higher rated player doesn't respect the lower rated player and takes risks.

Sometimes it's just one big blunder that ends the game right away.  All amateurs are capable of doing this.  These games you can't take too seriously as an indication of skill.  Play 5 more and see what happens.

This is common enough.

All rating systems are rigged.

Beer. Either the lack of it, or the overuse of it.

How can u overuse beer ?

well remember i am theoretical ~1400 (before the 20 or 30 time outs ) and we all do mistakes in games, the rating difference is not accurate also... I can lose against 1200 and it wouldnt be that weird...i think , depends what player and depends of diferent ways to play..

...maybe im wrong but thats what i think

it wasn't only our game, i was three pawns up in another game, and then blundered a rook and then my queen why?

this was not the game i was refering to but yeah

Maybe the lower rated players try really hard against you, and the higher rated players underestimate you, it happens to me to

Beer can only be rented.  Give some to your opponents.

Preferably before you rent it.

IDK if the Sam applies to you, but for me, it's structure. When I play people higher rated than me and I win I see their structure and goals their trying g to achieve. When I lose to lower rated players, it has to do with the way they just kinda throw things about and it confuses me.