In the 'recapture' of the amortization is treated as ordinary income.  But if the sale price of the asset is greater than the unadjusted Basis, ProSeries treats that amount above the unadjusted Basis as capital gain.

So it seems to be working correctly for the items that DO qualify for the capital gain.

For items that DON'T qualify, ProSeries is not set up for that, and I think you need to tinker with it (for example, (1) change it to less than one year, or (2) don't use the Asset Entry Worksheet and enter it on the worksheet on the top of 4797).