Retirement tax questions

The TT SEP calculation is doing something wrong, I think.  (More likely operator error, but bear with me.)

 

I've gotten as far as checking the box to maximize my SEP contribution. But the answer that pops up is several thousand dollars more than the net income from self employment on Sch. C  before calculating the SEP.  So I used a worksheet I found online and came up with what appears to be the correct amount.  I manually entered the amount I manually calculated but when I did a smell test the greater maximized account was entered on Schedule 1.  

 

Vot gifs, captain? (Only the elderly will remember the Katzenjammer Kids. )