Riding Lawn Mowers

I have owned a Husqvarna LGT2654 for several years now. I've replaced the deck belt about 4 times in 2 years, as well as the belt guide twice. Is anyone else having the issue of the belt jumping off track? I'm tired of replacing parts on a continuous basis that should last several years, or as the belt guide goes, never replace. It contorts in a way as to where it isn't reusable. I've done everything that I can think of to fix this issue, to no avail.