It may be helpful for some to swap the default key layout between the E and the Z keys. I feel like it correlates between the placement of your hands on the keys and the on screen actions better:

After switching

• Z - lower key, down, eject/drop
• E - higher key, up, insert

It's actually quite a good idea, but I've already kind of gotten the muscle memory down! I don't know why they didn't set it like that to begin with though.

The problem with changing key mappings is that it doesn't update the list on the right side of the screen :( so, it can make things even more confusing...