This was addressed by the:
Poker Operations Manager
Hi the antes are ‘part of the pot’ but for the purposes of betting A Pot-sized bet they are not counted until after the flop.
As Matchstk said the Pot sized bet would be quite a bit higher if the antes were included. Replay has defined antes in this way because we feel they are different to Blinds.
Antes are a forced contribution by all players, and not necessarily bets whereas Blinds are forced bets by specific players to initiate betting
Since this is No Limit, a player can raise any amount they like above the minimum, so they are not restricted to Replays interpretation of what is Pot size.