If the all in (raise) was not the size of the initial raise, then there would not be another raise possible and it would be call/fold only for the rest of the players.
ie: if the initial raise was to say $10 (raising 8-9) and she only had $15 total and pushed for $5 more on top then that kills any other raising. If she could make it $20+ (actually 18-19 I think, but it is to late/early for heavy math....like addition
) to go then you could re-raise to knock out other players.
This does not come up often, but it can be a pain if it is a loose table and an all in will get too much action behind your call, leaving you with little information on the flop. Unless you flop top set that is.....
