Not sure what type of rig you own as it is not stated, however it sounds as though your slide has gotten out of sync between one end and the other.
My slide-out motors are made by Power Gear and I found a manual on their web site for re-syncing the slide. I attempted it several times with no success so I ended up taking it to Alliance Coach in Wildwood FL where they spent a few hours straightening it out and checking as to why it got out of sync in the first place.
They are an excellent repair facility.
Dr4Film ----- Richard
2002 Monaco Windsor PBT 40Ft. (R HOME) - 30Ft. 2006 Pace Trailer (R JUNK). Trailer Has 06 VUE (R TOWD) 04 Victory Alen Ness Edition (R RYDE). Full-Timer for 14 Yr's BUT now a Part-Timer. Cummins ISC-350 With Banks Power Pack and Upgraded PRXB PacBrake.
Winter Home in Flagler Beach FL - Now Staying in Dansville NY for the Summer.