ADJ-CST variances on MES report quantity

We have been reporting labor for standard costed parts and are now testing using report quantity through MES on the floor. If we report quantities through Time and Expense entry or MES End Activity we see the expected mfg-stk and backflush credit of stk-mtl transactions at the standard cost. But if we report through MES Report quantity screen, we are getting a both a debit and a credit for the stk-mtl transaction along with an adj-cst variance. We report the same quantity and the cost is the same for all three reporting processes, but the Report Quantity is the only one to give us the adj-cst. I have not seen this before and wanted to see if anyone has seen this happen