I took off my seat for the first time the other day, to do SET valve removal & add in dealer mode switch. I go to put it back on, & the right side bolts on no problem. The left one however spins & spins, then just comes out. How was it threaded before & now stripped? Did I do something wrong? This is one of the simplest things to do & I messed it up. The seat & rear part of the seat move around easily now without it. Is this stripping common? I have ordered a thread repair kit as my last resort. Any suggestions?