I had everything entered properly for square footage detail and schedule C link. I even compared to the demo data you suggested.

It appears to be some sort of software glitch in the asset listing. The first line item in the detail is only populating Form 8829 if Method 99 is input. If the Method is blank, it also will not populate Form 8829.

I switched the order of my line items, and now Form 8829 and depreciation are correct.