I just learned that if HTTPS management is set to *ANY I can connect with port 981 instead of 443. Since I don't want just anyone to connect I configured rules that allow only specific IP's to connect. I then added a rule after them to block all other access on port 981. Some of the connections stopped working. I deleted the block rule and saw that it wasn't needed. Is there an inherent rule that if you configure one rule for remote management all others are automatically blocked? This happens with port 443 also.

The implied rules contain a "block any any" rule which is the last one.
Everything that is not allowed by either explicit rule in the configuration or one of the previous implied rules, is dropped.
This is usually logged as "policy rule 15" on Low & Medium security levels, and "policy rule 14" as well on High