Loading data and covers

I have 2500+ movies on my hard drive, and everything is set up beautifully. They are tagged, have covers and everything else. Top knotch!
But… First of all it takes infuse like… forever, to load covers, meta data and so on. How come? It’s right there, in the file?
Secondly: after a few weeks, when everything has FINALLY been loaded, and all covers and data is there, it keep searches for data, and some times it fetches NEW covers, but not for the movies that are on the hard drive, but something completely different?!
Appletv 2, jail broken, infuse.