Task View- "Contact Name" and "Related to" can't be added to view

Task View- "Contact Name" and "Related to" can't be added to view

Hi:

I tried multiple times to add the  "contact name" and "related to" fields to my task views but I can't seem to make the change or save the fields for some reason. That doesn't seem to be the case with other fields.

Is this a glitch? I thought it had worked in the past.

Dan Guttman