Attached is a screenshot of the filter rules we keep seeing whenever we turn our hotspot server on. Does anyone have an inkling as to why this is occuring?

Hotspot uses firewall filter to operate. The rules that appear are dynamic (they have a D). If you disable Hotspot server and delete these rules they will reappear when you enable Hotspot server. If you check Files tab you will see a lot of files place there by Hotspot also. Hotspot is one of Mikrotik best features.