I think this was intentional, but I don't like it and it will result in a poor experience if #9 is implemented.
Switching between the two screens of buttons should be a manual process, entirely driven by the big orange button in the upper left. Sometimes I need to drop multiple values, and I should be able to accomplish this with [⇧][DROP][DROP][DROP][⇩] Currently I have to do [⇧][DROP][⇧][DROP][⇧][DROP]