Mamiya 6 folder shutter issues

I replaced the bellows on my M6 folder. When I went to shoot the first few shots went off OK (I think) but very soon the shutter was malfuncationing in various ways, much like my spelling is now. Sometimes the shutter button won't depress; sometimes when I cock it, it fires immediately. Not sure what to do but sure hope it doesn't involve removing the bellows

EDIT: I think I found the problem. A small lever that trips the shutter must have gotten moved out of place when I had the bellows off, but it seems to be back in place and working for now.