Both order, and targets is messed up.
You can tell when you tab from Translate X, than it tabs to Z, but than there are three tabs which I guess are going from X up down arrows to Z up down arrows, and than finally paste button, before BACKING up to animation key of that row, before jumping to the next line. You can't focus on the up/down arrows to use keys, so this is a bad target. I only assume it's these up down arrows being targets because if it's another field, with just a single input and up down arrows, there is only one miss-tab before the paste button.