Imputed Income/GTL

We pay for our employee's life insurance through the last day of the month in which they are eligible for the coverage. So I have the benefit rules set up to terminate the benefit on the last day of the month on a term action. My question is, should BN150 be calculating GTL for a terminated employee through the last day of the month? We had all of our term statuses set up as NP/NB, so then the BN150 error report showed that the GTL couldn't be created for the employee even though the benefit had not ended yet. Last pay period we changed our term statuses to Pay/No Benefits, and BN150 created the time records for the terminated employees through the last day of the month.

So which is correct? My payroll person wants to adjust out the GTL that was calculated last pay period and set our term status back to NP/NB, but I want to make sure we are doing the right thing from a benefits perspective as well. Do we calculate GTL for only as long as they are receiving paychecks? Or do we calculate GTL for as long as they are receiving the benefit?