As for the hard buttons below the screen, the first and fourth button cannot be changed, "YET". This is a bug and should be fixed in one of the next firmware/software updates. Don't know what to tell you on the labels not showing in the simulator, mine all appear fine. Try deleting every thing in the label, saving, exitiing, reload, and relabel.

On the button that is greyed out, did you delete the actual button or only the actions for the button. If a button has no actions it will still show on the screen but will have little dots all over it.

Archer