yep...something like this for the first time with no suggestions from from anyone who has done it first can be a learning experience..
So, I know things don't like to stick if surfaces aren't clean. I use alcohol a lot as it leaves no residue and dries quick. It's possible the end of the overlap had skin oil from your fingers. You could lift that end....use tweezers, not your fingers....reclean the end that was overlapped, not the end that overlaps, with a cotton swab or something similar using alcohol...don't soak it...I hoped you cleaned the wheel or at least keep your fingers off....
What color is that wheel? is it white?....curious...Also, maybe you could use a razor blade and trim the excess close to the end .....or overlap lightly, cut through both ends, lift and remove the excess and then press the end down. the gap may not be noticeable....or.....a tiny amount of white paint pressed into the gap.....
Just suggestions...that may or may not work..the problem is you get just one shot....and then you have to order again...