Is it just me or are items disappearing because of the coin-insert bus?

When I deploy the bus that gives you candy or something by inserting items, it takes up a spot and doesn't disappear, so I don't deploy it. But when I try to deploy a needed item and click on it, it changes to that bus, and the item disappears as the bus arrives. Is it just me experiencing this? I've lost count how many times this has happened...