Running GP 2013 SP2. Just created an Excel template and then populated with the formula =100+200 (for a period total of $300.00.
Copied this formula across all periods for the same GL account.
After I imported it, Period 1 only shows 100.00.
Thinks this is a bug. Changed the Period ID from "Period 1 - 2014" to Period 1. But got the same result.