XBMC4Xbox

As of the last few months I've noticed that shows I have shared thru 2 large external hard drives have not been showing up in XBMC or the "File Manager" part. It will show a lot of data, but episodes of whole seasons will just not show up. I've checked that they are in existance on the windows 7 machine they are shared off of, but no change in XBMC they just don't show up. It's a very strange thing as it's obviously not a naming convention as similar files show up fine. I've only really experienced this in the last few months. The thing that is strange is I can move one said file to another place and it will show up. Now I don't use the "Library" feature, but it's almost as if these files need to be scanned and added as new. which is strange too because most of what I'm looking at has been on the HDD's for quite some time and have showed before. Hope the description makes sence. I use constant SVN build updates and no change as of yet.