Want to base depreciation on periods not days

[MelaJoe]

I am running depreciation (R12855) and I am putting a period number in the processing options (not a specific date). I was under the impression that this forced a calculation based on periods, not days. I have many assets that are getting period based depreciation doing it this way, but I have other assets that will finish depreciation this year that are calculating based on days instead of periods. Does anyone know of another setting that would force final year depreciation to be daily instead of periodic? The way I know is that the Depr did not remain the same Feb to Mar, and on the PDF for R12855 I see a percentage under Apportionment that I could only calculate by adding up the days so far this year and dividing by the total number of days of depreciation this year.

Assets use Comp Meth R, Depr Formula 107, Basis Formula 510, blank on Intial Term Apportionmant, Spread Pattern, First Year Spread, and Last Year Spread.