I've choosen that example with 1
BTC to keep it simple to verify!

According to this, my profit should be 0.24
BTC when i win 12% and not 0.12
BTC which looks more like a leverage of 1 and posted in the picture before!
12*0.02=0.24

1% increase when opening the position at 100$/
BTC would be much more different than 1% increase starting with 200$/
BTC at all! I'd really appreciate an explanation how this %-thing works at all.
It says there if price of BTCUSD goes up 1% you will profit 0.02. The percentage that is shown in first picture (+12%) is % increase of your value invested (1BTC I guess). So that means since you bought BTCUSD it went up 6%. With leverage of 2 that's 12% for your 1BTC (+0.12) and that is what is shown in your first pic.
added: You can check how many % BTCUSD went up since you bought it by calculating Entry Price and current price.