I have a bill reminder to delete, but can't delete it

I have a bill reminder that is no longer valid. The account is closed. Bill still shows in my list of Bills & Income, and as "Needs Attention". I have tried looking for several ways to delete it. I opened up the "Manage Manual Bills and Income", but for some reason, out of all the reminders, this one does not show up for me to delete it there either. I have closed the register account and hid the account that it was tied to, so I unchecked the hide box for this account register and tried that, but to no avail. I would LOVE to get this thing out of my list, as I believe it MAY be a contributing factor to 2 other items that won't update, starting about the same time this bill became no longer valid.