Onefish, as I suspected you somehow mistakenly marked the Maximize box for an individual 401(k), perhaps in addition to marking the Maximize box for a SEP-IRA contribution.
In the online version you can delete a form by clicking Tax Tools -> Tools -> Delete a form, then clicking the Delete link next to the form (in this case, "Keogh/SEP Wks").
You can also just revisit the Self-employed retirement contributions section, indicate that you made a contribution to an individual or Roth 401(k), then on the next page explicitly remove the entries there.
