Bank reconciliation variance

Hello, there is a discrepancy between the adjusted book balance of our bank rec and our gl account over a number of periods. The first variance ties perfectly to one entry that appears like it was posted correctly as a bank entry and cleared on the bank rec. It doesn't appear to have been double posted, and it did post on both the bank module and the gl module. I am at a loss as to what is causing this difference.

Has anyone encountered this before?

Thanks!

-a