FUD, the state waiting period is 72 business hours. If you buy the gun on Saturday, you pick it up on Thursday. It's five days but only three business days.
It sounds like the clerk made a mistake. But try to keep in mind that he faces criminal prosecution if an undercover ATF agent can get him to make a straw sale. His attitude was probably better safe than sorry. He misinterpreted a situation and lost a sale but he was playing CYA. There aren't too many other retail jobs that land prison sentences if you screw up.
It sounds like the clerk made a mistake. But try to keep in mind that he faces criminal prosecution if an undercover ATF agent can get him to make a straw sale. His attitude was probably better safe than sorry. He misinterpreted a situation and lost a sale but he was playing CYA. There aren't too many other retail jobs that land prison sentences if you screw up.