The same number in box 1 and box 2a on CSF-1099-R after simplified method calculation?

I have two 1099-Rs.  One CSA, one CSF.  On both box 1 (gross distribution) is filled in, box 2 (taxable amount) is blank.

 

Entering the first one and going through the calculations of the simplified method (showing a previous tax-free amount), when I review to double check it, box 2a is still blank.

 

Entering the second one and again going through the calculations (and also showing a previous tax-free amount), when I review that one, box 2a has the same amount as box 1, showing the entire amount taxable.  Even after I delete the entry in box 2a, after the calculations, the box 1 amount is in there.

 

One is an annuity, the other is a survivor annuity. 

 

Why is the entire amount in box 1 now the taxable amount (box 2a) even after the calculation? 

I haven't noticed this (above) in previous years.