Prima Poker Software Flaw

[poolshark]

I am playing on Royalvegaspoker of the Prima poker network.

Situation:
Multi table NL tourney. I have 4500 chips, player A has 6000, player B has 1100. BB is 300. no one else plays in the pot except the three of us. Player A acting before me raises to 900, I call the 900, Player B then goes all in for 1100 - making a SHORT RAISE of 200. Player A then reraises to 3600!!! This is insane! Totally against the standard rules of holdem tournaments. I have verified this many times before making this post.
The orginal bettor should not be allowed to reraise if the all in person makes a short raise!
Atleast Poker stars and Party poker definitely protect against this.

What do you guys think?
Has anyone else noticed this?