Do you have any other businesses on your tax return that may be affecting things?
Have you double checked that while in the K-1 section, you checked the box about health insurance AND entered the amount from Box 5 of your W-2 (again, WHILE in the K-1 section).
Did you enter anything about health insurance when entering your Schedule C information? You should not have. If you did, that may be where that amount is coming from.
When entering the K-1 from the corporation, THAT is where you need to be entering the information about health insurance.
If the health insurance was from the corporation, it is NOT entered as part of Schedule C. Schedule C has nothing to do with the corporation.
Go back through the K-1 section in the program, and look for the check-box about health insurance, then answer the followup questions.