Solved
I said yes to all three questions, said yes to the 15 days, gave the square footage, said yes to the simplified question. Everything you have posted would have this be an eligible deduction. It doesn't seem to be working correctly. Unless there is another requirement that you didn't mention.
If you show a loss on your Schedule C, you're not allowed the deduction.
This, from IRS' page on Simplified Option for Home Office Deduction:
Deduction cannot exceed gross income from business use of home less business expenses.
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.