Same here will be doing that on the first service visit.That's correct - have not yet gone in to have it fixed. I plan to do so, however, in the next few weeks and also have them address the rattle in the back seat. Will report back after fuel gauge issue is addressed.
At least the OP was able to fit more fuel than mine - it still reads 14gals maximum.
Having about 1.5gals of reserve fuel is a good safety margin IMO>=.