should not be able to refill while still in a hand.
In a multi-way pot, a sidepot is created for other players if one player goes all-in. These other players bets and raises will go to the sidepot, and only the players that participated in the sidepot are eligible to win it.
a player should never be allowed to bet lower then the blind.
example ( if blinds are 5 and 10 i should never be able to raise 1 chip).