If your strap screw holes are elongating the first thing that comes to my mind is how are you playing it? Are you a little too active and possibly rough? Still, I've had very high quality and expensive guitars do the same thing. You have to realize there is a lot of pressure on those two screws. I usually just refill the holes with wood and glue and let it harden and reinsert my screws. Seems to hold forever then.
As far as the bridge goes, I hear you on that one too. I've got a few guitars that will change over time as the screws wiggle. The simple fix, if you want to keep that bridge, is to invest $4 on some Loctite in medium strength. Put a little on the offending screw threads and you should be good for a long time. Otherwise, there are plenty of good, inexpensive after market bridges for that bass so you could make a nice tone improvement even by replacing the stock bridge.
"No Tele For you." - The Tele Nazi
Ha! Tele-ish now inbound.