Membership – unable to delete Subscription Plan

I think that a couple of problems I am having are related.

First off, I was having a problem with Membership not displaying a button for the FREE account signup.

Nothing I could do would fix it.

So I went to delete the subscription plans ( I had three ) and only two of them will delete.

The other one says it was deleted, but it is still there ( and that is the one that would not display the signup button ).

I have ran the verify and repair functions, but to no avail.

As an aside, it shows there are users in the plan (although I had deleted the users).

Any ideas where to go from here?