England did not abolish slavery in 1772, they didn’t even complete the job in 1833 either. They later had to come up with yet another bill to address slavery in (India I think it was).
Yes. 1843. https://en.wikipedia.org/wiki/Indian_Slavery_Act,_1843
Look, Franklin was an instrumental Founding Father, there is no denying that. And Franklin was a staunch abolitionist. Regardless of what Franklin thought of slavery, he was sadly unable to end it.