Anyone else besides me ever have the bank coin counter be off? It just happened to me today, again. I sat in one place and unrolled two boxes of halves. After I open each individual roll I put the coins into my canvas type Bank bags. Except for of course any coins that I might want to keep for my collection. Today I got shorted $2.50. Which I really don't want to push the issue with the bank tellers because I'm very cautious not to hinder my opportunities of getting boxes of half dollars. I don't want to wear them out to the place that they hate seeing me coming in. So I guess I just look at it like that is pretty inexpensive to have my coins turned back in since it is a free service with my account. Having said that, I've had it work in my advantage at least twice and more than just a few cents. At one particular Bank they counted 40 something dollars more than I felt that I had. And then again recently they credited me $39 at least more than I had. I brought it to the bank's attention because I want to be honest and told them I feel like that that was more than I actually brought in and they said not to worry about it.
A similar thing as happened to me in the past. Once I got a 25 dollar box of cents from the bank and searched through them. After I finished I took those coins and ONLY those coins to a different bank to have it converted back into cash. After they were counted the total came out to $137 and some change. My guess is that the machine that was used to count the coins was never reset.
This has happened to me before too. I found that going too fast can result in monetary loss. And if you go way too fast with dimes the machine gets jammed and when the teller opens the door and moves some of the mechanisms around to unclog it, coins start pouring out and rolling all around the room.
This was many many years ago. But TD bank always miscounted the half dollar return in my favor. And later due to aa lawsuit, TD bank sent me more. However losing those counters ended my penny hunting / copper stacking. It's really good to know the amount that you're returning and announcing it before pouring, in case you need to dispute the count.