Hello to all 
After years of betting with tradional bookmakers, decided to go further, with betting exchanges...
Decided to take my first bet just to see how it works, and now I'm pretty much confused
As I said, first bet was just to see how the commision is calculated, so I went with minimum stakes, 4.50€
I've placed a bet (Sedan -0.25 @1,96), and I've been charged for an extra 0.02€, my balance was decreased for 4.52€ instead of 4.50€
That confused me a bit, cause rules says that commision is taken only on winning bets, not on your stake
Game finished, bet won, and new commision for me
Instead of 4.32€ profit (4.50x1.96=8.82 | 8.82-4.50=4.32) I've got back 8.62€ which means 4.10€ of profit. Another extra fee, now 0.20€
Questions:
What is that 0.02€ and what is 0.20€ fee?
Is there any way (formula or something), that can recalculate the odds, because my current balance does not coincides with my balance that I keep record of in my excel file? For example; for my bet mentioned before, the real odds would be 1.91 instead of 1.96 (4.50€x1.91=8.59 |8.59-4.5=4.09€)... hope you understand what am I trying to say
Thanx very much in advance!

After years of betting with tradional bookmakers, decided to go further, with betting exchanges...
Decided to take my first bet just to see how it works, and now I'm pretty much confused

As I said, first bet was just to see how the commision is calculated, so I went with minimum stakes, 4.50€
I've placed a bet (Sedan -0.25 @1,96), and I've been charged for an extra 0.02€, my balance was decreased for 4.52€ instead of 4.50€
That confused me a bit, cause rules says that commision is taken only on winning bets, not on your stake

Game finished, bet won, and new commision for me
Instead of 4.32€ profit (4.50x1.96=8.82 | 8.82-4.50=4.32) I've got back 8.62€ which means 4.10€ of profit. Another extra fee, now 0.20€

Questions:
What is that 0.02€ and what is 0.20€ fee?
Is there any way (formula or something), that can recalculate the odds, because my current balance does not coincides with my balance that I keep record of in my excel file? For example; for my bet mentioned before, the real odds would be 1.91 instead of 1.96 (4.50€x1.91=8.59 |8.59-4.5=4.09€)... hope you understand what am I trying to say

Thanx very much in advance!