929 Shock Help — Fifth Generation VFR

Well over the winter I installed a low milage 929 shock. Fast forward to spring when I finally get to ride it and I'm blown away. My bike felt so much more stable and I felt a lot more confident. I aquire a new EK quadra super molybendum pro performance flux capaciting super heavy duty mega chain (because it was orange of course) and Galfer stainless lines (which I don't recommend unless one of yours is broken or you want to switch colors). After installing said brake lines I brought it to the local (one hour away) Honda dealer who told me my brakes couldn't be bled because of the anti dive unit ect. and to get my chain swapped out. I noticed on the way home it felt a bit harsher/stiffer but I chalked it up to not having rode a lot lately. As I neared my house I hit the railroad tracks that cross the highway and the back started wobbling side to side- these tracks are semi-rough but I never had a problem before. After getting home and changing my underwear I thought about it and figured maybe I hit a really bad spot in the tracks so the next time I crossed them I looked for the best spot and same thing. If you can imagine a rider with last season and this one having this happen it's a miracle I didn't dump it. The tracks are flat and cross a two lane highway but the only thing I can compare it to is the Isle of Mann preview on Speed Channel in Demand where a rider on a red bike comes over a small hill catches a little air and the back end gets real loose when he comes down. But wait- there's more! Saturday after work I decided to take a ride around Oneida Lake (I'm aware I said Onondaga in another post but I meant Oneida) on the back side of the lake I got stuck behind a car doing 45 in a 55 and in front of a tailgating Harley so I see a car heading towards me in the oncoming lane but he's a way off, I signal get in the passing lane and give it the beans. The car who was in no particular hurry before now decides a drag race is in order as I have a car heading towards me that is a lot closer than it was before I can't back off because Harley guy decides he should pass too and then I feel the ass end just go away right after I spot a tar snake. The bike snaps back up and starts the super fun good time omg I'm about to die wobble then straightens out at the last second. I seriously thought that was it for me. So my long awaited question is this- if for some reason the shop messed with my shock settings which adjusters do what? It feels completly different than it did before I brought it there It's so firm it's unpleasant and I think maybe the combination between firmness and rebound being too slow is causing this. I don't want to not ride but I don't want to die either, any suggestions? p.s. I already checked out the mount I fabbed up and it's not loose or broken