Ticked off!

well my guess is that it is leaking from the sending unit not the fill tube... usually the locking ring on the sending unit doesn't put enough pressure on gaskets to seal so you can either double the gaskets up with sealer on them (let sit 24hrs) or try another ring... it seems to be hit and miss on the rings sealing...

as for the cluster issue sometimes the needle hits the high beam lense (i think thats what it was) so it gets stuck on one side or the other... did you have the cluster rebuilt?