You guys are too much
Paolo, just so you're clear, "pot" is not just the amount of money that pokerstars shows in the middle of the table.
Example
16 cents in the middle after pre flop raises
Your opponent bet 8 cents, or half pot
- at this point, there is only 16 cents in the overall pot, so 8 cents is half pot bet
You raise to 16 cents
- yes, the middle pot does say 16 cents, but the addition of your opponents money and the fact that you have to at least call his bet to continue on has changed the "pot" value
- at this point "pot" is 16 cents from the middle, your opponents 8 cent bet, and the 8 cent bet that you have to call to match his bet = 32 cents
- in order to raise to pot, you have to take the above number and add it to your opponents bet of 8 cents -> 32 cents + 8 cents = 40 cents is a pot bet at this point (32 cents is your raise)
Your opponent raises the full amount
- the full amount is "pot"
- 16 cents in the middle + his original 8 cent bet + your 16 cent bet + the additional 8 cents he has to call to match your bet = 48 cents
- add the above 48 cents to your bet of 16 and your opponent can raise to 64 cents or a "pot" bet (48 cents is the raise, 64 is the overall pot bet)