I'm not sure <but let me act like I know>. I think that all of the maps pull from one maplist called like mapcycle or something (whatever you want to set it to w/ different mods / plugins) and they should go in a pretty standard rotation. However, rtv's override that... for example... if the map list is weaver, deagle, churches... and your on weaver but you rtv it to deagle.. the next map is still going to be deagle... basically it changes the current map, but it doesn't reset the rotation.

I haven't done much server work for a long time, but I think that is how it works...
Don't be hating on me if I'm wrong.