Sales Invoices, Source Module, and Fiscal Year

SOLVED

Hello, I've just discovered this following fact about our data and was wondering if anyone here had any knowledge of this situation. 

In our SINVOICE table we have records populated by two sources; Sales (ORIMOD_0 = 5) and A/P-A/R Accounting (ORIMOD_0 =3).

Viewing the field FIY_0 I see that records coming from A/P-A/R Accounting correctly reflect the fiscal year (checked by looking at the year of ACCDAT_0; our fiscal year and calendar year are the same), but those coming from Sales show FIY_0 = 0. 

Thank you for any insight.