Phuket wants to have a " prove " where you stay " normaly it's enough if you have the address and the name of your hotel written in the form ( Patong ) in phuket town they want a confirmation of the hotel , l
Well actually YES and As IT from the Same school Company ( i guess) and the WP and the visa are till may it should be no problem....or just let him change the contract till then....
Did you made a simple border run this year ? 2 are possible means you can extend again ...should reach till April....but you need to do a work permit and the process