Hi Bryan,
If a specific tag is causing problems, it will usually show up in the Event Log. You may want to look through it for some clues.
You can also disable tags in error by checking the box in the General Settings menu under IO Servers.
Regarding your viewON question, I’m going to ask our Technical Support department to look into this one. I’m traveling for the majority of the next three weeks, so response times from me will be long.