Did delete the BT linkage from both sides, the phone AND the car?
I had a little BT flakiness with 218 (I admit, 218 hasn't been the most stable I'e seen so far...), but managed to get mine all squared away by re-linking everything, and it connects to both my car and earpiece now, consistently, with no issues.
If I were you, I'd consider doing a backup ,and then a reset, I know it's kind of a pain, but the time you spend setting back up a handful of things will probably outweigh the time you spend digging through logs on the phone, trying to figure out why your internet linkage is flaky, etc (mine works okay on 218 now, I also did a LOT of fiddling, and probably should've just done a reset).
-pete