Hi Chris - thanks for posting and sorry to hear that things aren’t working as expected.
Can you clarify if you are adding additional devices from your SharpTools User Page → Manage Connections or directly from the Hubitat hub interface?
There seems to be a Hubitat bug at the moment where the web based authorization flow doesn’t remember the checkboxes for your previously selected devices. The issue has been reported to Hubitat and they’ve indicated that they are working on resolving it. In the meantime, if you don’t see the previously selected devices checked when you go to authorize from the web, I would recommend adjusting your device selections directly on your hub.