So there are two possible options for symbols. The first is the symbols that show up on axis of symmetry if you have "Symbols At Points" checked. That one there should only ever be as many symbols as there are points(So I'm guessing you have Symmetry Count set to 8) the other option is to check "Symbol Ring" which will use all of the text in the "Symbol Text" field. Hopefully, that makes sense?
I actually considered the first option already but the issue is that I have it set at a value equal to the number of symbols I wanted to add in the ring (in one case, I wanted to add 10 symbols to the points - one symbol per point - but it wouldn't go over eight even though I had also set the symmetry count to 10 as well.) Also, I don't really want the symbol ring to show up, I just want the symbols to show at the symmetry count points, so the second option you mentioned doesn't really work in my case.
In addition to this, I've noticed that in some cases, it doesn't even allow 8 symbols to show up at the symmetry points unless I add a value of 1 more than I wanted to have showing to the symmetry count section. This would mean I'd have an extra symmetry points with no symbol in it and I don't really like the way it looks with that.
Please advise me on a way to fix this if there is something I can do to fix it on my end.