Cross-Scoring in v2.5.6

I had V3Arcade Installed in my forum. I used the converter tool and converted all the scores from V3Arcade to a fresh instalation of IbProArcade... Everything works fine, excepto a bug with "cross-scoring"... I've read that this was fixed in version 2.5.5, but it seems that I still have this problem..

Ex.: If I open two games, the score of the first opened, goes to the second game I've opened...

I'm running VBulletin 3.5.4, and IbProArcade 2.5.6+

What can I do about this?

Also, another problem is that when submiting a score, some users make multiple clicks or refresh the page, and the score is submited multiple times...

Thanks!

Edit:
I've submitted a score, and then go "back" in my browser, and tried again.. Now I see this message:

"This score was not submitted from the game. Your score will not be saved."
I think that is how it should work, but It doesn't do that in the first try to submit a score..