Firm moved from New York to New Jersey

My firm moved from NY to NJ in 2020. I understand that NY requires box 16 on the W-2 to contain the full year income to be reported to the FED and you reconcile only the earned NY income on form 203.

 

for New jersey, my firm reported one box 16 to NJ with the correct income only earned in NJ on my W-2, however they also file an additional reference and filing copy to NJ with box 16 containing the earned income that was reported to New York. I lived in New Jersey the entire year. 

 

Does New Jersey only report income earned while the firm resided in New Jersey on the W-2

or did my firm correctly report both incomes to NJ , one with income earned that year and one with income earned in NY ? 

thank you