Excel asking to unprotect an unprotected worksheet

[roemun]

I am working on a worksheet that has been protected off and on. I unprotected this AM, but XL will not allow changes and instructs to unprotect the WS, but it is already unprotected. The WB is not protected and never was. I am at a loss as to how to work around this problem.
Any suggestions will be appreciated.

 

[roemun]

As it turned out, and as is usually the case with XL, the solution was a simple one, and, as is also usual, it was operator error. It started because someone put sheets that were already protected into the shared mode. That doesn't work very well.