Sure hope your joking, because that is some of the worst advice I've ever heard.
The correct response to this situation is to call the bank again, keep track of names, call the payroll department of her company, keep a record of everyone she has spoken with. Do not transfer any of the money, do not spend ANY of the interest (since it isn't really hers to begin with). In fact, if she can avoid it, don't even use her accounts till this situation is cleared up.
Having worked a bank for many years in the past, it is surprising how long this kind of situation can take to clear up. If the bank's proof department thinks you should have x amount of money in your account, then by God it is very hard to get them to reverse the error sometimes - even if it is a ridiculous mistake in your favor.
The actual tellers in banks really don't care what the check says unless their is cash involved. Especially if it is a regular customer, most banks simply deposit whatever the customers says is the correct amount from the deposit slip. They rely on the proof department to verify the amount, and once the deposit clears it can sometimes be very hard to fix this kind of error.
Nothing kidding about it. If they don’t fix it by the end of the month they’re on the path to losing it. The reason to transfer it is that indeed then the interest IS hers because it came from a completely different bank, that’s part of the reason to slide it out. Heck she could take it out Tuesday morning, she should just understand that sometime in the next couple of days they’ll figure it out and expect their money back. But if she can pony it up anything else she gains from it is hers.