Hey ROB! No need to hesitate to ask, I'm happy to answer questions and explain my attributions.
I'm confident this is FS-501. Die wear and coin wear can make a mint mark appear to have been shifted slightly from its original state, but this is a well known RPM and the only RPM for this date that is this far right aligned with the 5. It's safe to say if you find one that looks like this then it's FS-501.
Thanks. It's a really cool find. It just looked a little different. Actually thought how can that be. And if so then maybe a new find. I put your picture approximately on angle as theirs. I see what you're saying. My bad. Congrats again for the find.