Sage Intelligence using Fiscal Year 4-4-5

In Sage Intelligence if I run the report Fiscal Year Detail, the start date is not accurate if you are using a 4-4-5 Fiscal Year.

The formula used to calculate the start of the month is not accurate and is off by days, resulting in incorrect period reporting.

DateAdd(month,-1,GL_FiscalYearDetail.PeriodEndingDate+1)

Has anyone else come across this or any suggestions.