Rules for raises question

I'm confused about rules for raising. Playing online I got to see a free flop from the BB in a PLO game. Caught top two pair with a king high flush draw against only two other players. The flop came out really low but a straight was possible. I figured I could maybe pick it up right there. I bet the pot for $40, was called by third position and was raised by the cut off seat, who moved all in for $45. So it was a $5 raise. Of course I called the additional $5, but here is the confusing part. The third position player made a pot-sized raise after I called!!!! So why was he allowed to make a pot-sized raise there? I was under the impression that an all in wouldn't be considered a live raise unless it equals at least half the original bet. Any thoughts? I decided not to call in the end.

[joewatch]

Yah, that is messed up. What site were you playing on? I have played NLHE on some of the smaller sites (like Absolute) that allows the type of reraise you are talking about.

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I was under the impression that an all in wouldn't be considered a live raise unless it equals at least half the original bet.

[/ QUOTE ]
Actually I believe an all-in raise does not re-open the betting in PN/NL unless it is a full raise. The "half-the-original-bet" is used in limit poker if I'm correct.
Not following these rules doesn't seem right, but if you have to play by them make sure to adjust your play accordingly.

FRC

[boscoboy]

crypto sites have this glitch - you just have to plan accordingly