Should I rock over the plywood?

hey all I setup a pull up bar in my garage, and i had to drill four holes in my wooden studs to install it with big lag screws. the screws are in ok, and i can lift my weight on the pull up bar no problem...but the screws still twirl around in circles and i don't trust the setup. Is there a way i can get the screws in there tighter or more solid ? I was thinking using some kind of poly filler in the holes where the screws went, and then put the screws in behind them. Would that work? Any better ideas? Thanks in advance

My upstairs tub had a slow leak which I fixed. I found the problem because a small amount of texture and paint started peeling off the ceiling downstairs in two small areas. No water was dripping from the areas. The drywall is solid, it appears it just needs to be completely dried, prepped, textured and so on. Now here's the question: do I HAVE to cut a hole in the ceiling to air out the drywall to prevent mold? Like I said, it was a slow leak (maybe over a few months) and the drywall is a little damp, but is solid. I can, although I would prefer not to, cut out the drywall to air it out. Do I really have to be concerned about mold growing when it was a minor water leak? Thanks in advance!