1) That is the factory reset. Your procedure looks good, but I would not hold down the volume rocker after the "erasing" messages come up. Try doing it the same, but release everything after the message comes up.
2) That is the update from sd card procedure. Which we may need again....
3) That is how to boot to the bootloader. It is the same as the factory reset, but you use the other volume rocker (volume down). It is not needed if you are on the stock bootloader (which you are).
If a couple more tries of the factory reset procedure (also a link in my signature), doesn't clear it up. You might have to try the Acer rom HERE< And the update from SD procedure. Which will reflash the stock ICS on your tab.