Re: I made the mistake...
Not sure what you think your mistake was but I dont see anything you did wrong. It is OK to offer your snake food while in shed, they just wont always take it. Only thing I would have done differently is not moved his tank after eating... the movement could have caused him to regurge his meals. Other than that your fine.
Re: I made the mistake...
Some snakes will eat just the same whether they are about to shed or not. I have one or two I don't offer prey to when about to shed based on previous experience, but most of mine eat just the same. BP's don't need to see to eat.