4-4-5 Fiscal Calendar - What's the impact on Compute Depreciation (R12855) and Depreciation Projecti

We operate on a 4-4-5 fiscal year calendar.  When I run Depreciation Projections (R12865) by period, the system appears to calculate the monthly projections based on 4-4-5.  However, when we actually run the R12865 to Compute Actual Depreciation, it's calculation based on even 12 periods.

How can I get both programs to calculate using the same monthly pattern?  I don't want to use projections based on 4-4-5 calendar for budget and immediately have differences between budget and actual.

Ideally, we'd like all depreciation to be based on 4-4-5 processing.  Is this possible?