Here’s the difference. For a particular format, they show you progress during the select Timeframe not overall.I gained 224 Elo in Rapid in the last year.
In the main page, only the amount of game played changes when you choose another time frame. That doesn’t really help 
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I'm lost.
In one view your rating is 1494 (increase of 912)
In the other view your rating is 1494 (increase of 224)
Why are these different?
In the first one (main stats page) they show overall rating difference between your lowest level and your actual elo. It is the same whether you choose 7 , 30 , 90 ,365 days or all time. That’s very useless.
when you select a particular format ( like rapid ) they show the difference between your elo at the beginning of the period and your actual elo.
the main page should also be like that.
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It would be much more useful to show us progress during the selected timeframe.