Thank you so much -- this is so helpful! It turns out that, when they came into QB from Wells Fargo (via Authorize.net, because they're credit card payments), even though the payments just said "bankcard deposit," because each was for the exact amount and day, I'd matched them.

So, they were already counted as deposited: When I tried to do as you said, to deposit them, I got a message in QB that they were already linked to a deposit, and I figure that this is why: I'd already matched the payments to a member.

Does this make sense? Again: thank you so much! -- I'm betting that there were a couple I didn't match yet, and in any case it helps for the future, for sure!