Does TeamCity cache build scripts?

I have a master msbuild script that references an xml file for configuration settings.  I have a copy of those files on each agent's root directory which are referenced by my build configurations.  When I update the scripts and rerun an existing build revision (SVN & TFS), it doesn't pick up my changes, however, when I build the next revision, it picks up the changes.  Any ideas what is going on here or what I can do to have TeamCity pull by updates when I make them?

Thanks,
Bryan