I hear you. I'm 6A and my neighbor is 6, and it causes confusion sometimes. (My cable supplier, for example, doesn't seem to have any way to put street addresses that are number-letter combos into their system except by something like "6 Anyoldroad Street, Apt. A" And that's just not right.

Also, when ordering delivery I have to be very clear that it is 6A not 68.

Most annoying.