Gorcey's heart was no longer in the BB after his dad died. he made demands of the studio that he knew they would not meet.Gorcey was 40% owner of the series , this made him the boss untill he left.
Huntz Hall was still under contract and inorder to not lose money on him the studio made 5 more BB films. Hall resented Gorcey (who had at first had single credit over the rest of the BB) and saw this as his chance to shine.
Hall was now the one with his name over the rest of the BB . unfortunatly for Hall, fans didnt take to Gorcey's replacment Stanley Clements . in retrospect they should have canceled the series when Gorcey left or when Benard Gorcey died.

reminds me a little of when Laverne & Shirley went the last season without Shirley because Penny Marshal was still getting paid (both saleries btw!).