I'm curious, what happens if you force standard deduction (I think the checkbox is on the Fed Info Wks).  Is it smart enough to fill out Sch A correctly?  If not, I think a call to support is in your future.

While I think in a perfect world this would be one of the things that the software optimizes automatically, I wouldn't have the expectation that it does so.  I do expect it to have a mechanism to report this correctly if not itemizing though.

Of course the 4684 needs to be done correctly.  The numbers flow from there to Sch A.  Garbage in, garbage out so my step 1 would definitely be to get the 4684 done correctly.