This was broken last year and reported to them, and they still have not fixed it, so I don't have much hope they will ever fix it.
If you open the NJ-1040 P2 in the Forms View, you can right click on the incorrect Line 20b amount and choose Data Source, and it will open a popup window showing what it is totaling up to get that line. Then you can see if you have values from the Pension, Annuities and IRA Worksheet that really should be added in to come up with the correct total.
Then right click and chose Override and put in the correct value.
