After going through the "interview" more closely, I found my mistake, which was previously entering a duplicate $7550 for "personally made contributions". When I revisited subsequently, the text was slightly greyed out making me think it was just auto-copied from the box 12 entry.
Since my employer makes a contribution on my behalf, I thought, "personally made contributions" was what I contributed personally, via my paycheck, but I now realize this is not the case. In retrospect, the employer contribution and my contribution are not delineated anywhere that I can tell, so I guess the IRS doesn't care whether it came from ie employer or me.
