Closing Out Remaining Balance and Tax Issue - Creates OV

We have a problem with 2 way orders creating "Received Not Vouchered" OV entries in the G/L.  It seems that the issue is related to tax.  This is what we have discovered:

Enter a line with Tax flag Y, for example $2283 Y Tax.

This shows as Order Amount $2283 and Tax Amount $216.89.

Make a Partial Payment of $685.65 plus $65.14 Tax, Total Payment of $750.79.

Close the remaining balance using "7".

It relieves the remaining Gross Amount of $1597.35 but creates an OV for the remaining Tax Amount of $151.75.  It is not relieving the Tax Amount.

This also happens if it is closed without making any payment.  In that case the total Tax Amount remains as an OV.