I also had this problem. Then I went back into database view and discovered it had automatically changed all my due dates to the first one. I manually changed them back to the appropriate dates, saved everything and tried again. Still the full amount. Then I closed out of FENXT for the day and came back to it the next day and tried again. At that time it printed only the first payment from NXT. Not sure why it didn't work the first time.
I also had this problem. Then I went back into database view and discovered it had automatically changed all my due dates to the first one. I manually changed them back to the appropriate dates, saved everything and tried again. Still the full amount. Then I closed out of FENXT for the day and came back to it the next day and tried again. At that time it printed only the first payment from NXT. Not sure why it didn't work the first time.