I found another oddity when performing this task. The GL for this system had originally been setup with the year designation being the same calendar year as the end of the fiscal year. Thus; ""2015"" was FYE 09/30/2015 and ""2016"" was FYE 09/30/206. So when we created the short year (10/01/2016 - 12/31/2016) to move to a calendar year basis, the short year was ""2017."" This is what necessitated the ""renumbering."" In short, because ""2016"" already had 12 periods in the GL_PeriodPostingHistory.M4T file, I had to reinitialize THAT file as well! The recalculate DID NOT get rid of the 4th through 12 period in the 2016 year so those figures threw off the 2017 beginning numbers. Fortunately, the ""recalculate"" function recreated all of the entries in the GL_PeriodPostingHistory file and everything looks good now.