HMM...I have a 16 by 80 single 12 years. I'm wondering how uneven your floor is. I suspect that the home has settled a bit and caused your problem. If it hasnt gotten worse it may have finished settling.
Anyway if it isn't very uneven, say 1/4" then you could put down sheets of LUAN first making sure the sheets are centered over the seam. This would make a continuous smooth surface for the Laminate. The slight rise would be negligable. If you purchased it new you may be due a second leveling from the home seller/ installer. when I bought mine new I had 2 re-levelings due. We used those by the 4th year and it has sdtopped settling after that.
If the difference is real bad you could install plywood of 3/4 thick then the laminate. Either way I'd put something down first. I've been remodeling mine the past 3 months because we plan to sell it. The worst part is that nothing from Lowes, HD, etc fits a M.H. Like water pipes so we have to go back to the MH dealer.

Unfourtunalty the company we bought ours from closed within 2 1/2 years of us buying ours. I've never heard of getting relevelings done. They never said anything about that to us. I hope it doesn't cause any real structural damage.