VoteMap Problem

[flashstar]

I'm running the Mani Mod with CSSDM and Mattie Event Script installed and whenever it gets to the specified number of kills before a map change and the vote map list comes up, there is an option titled "extend by 20 minutes". My problem is that I can't extend the map 20 minutes because there is no time limit. How do I replace this option with "extend by 40 kills" or delete it?

Thanks