How does it look working outside your MOS in a non-MTOE position?

 I took an open requisition through ASK to make an interpost transfer. Once I arrive to my new unit, I am pulled to work outside my MOS, as HQ Platoon SGT and orderly room NCOIC(of course neither are on the MTOE). While I do not mind working outside my MOS for a bit, I am always looking for my next assignment. I find out there is an opening in FT Stewart, in January 2015 and ask branch if I can have the assignment and send them the requisition number. I will have been at FT Bliss for over 3 years, and at my current unit for a year at the time of PCS. Branch tells me my unit strength is too low. I check the MTOE and to my suprise there is only 1 91B30 slot available for my current unit. I verify this information through S1 and retention. There are currently 3 91B3 in my unit, one is double slotted with a SFC and the other is holding a 91B20 slot. I explain this to my branch manager, and PDNCO. The other 91B30s are new to FT Bliss, only about 5 months on station. Of course, I never hear back from branch, although they read the emails they never respond. I do not know why it is so hard to get them to place you on assignment, I am sure if they were to show up and not have an MTOE position they would want to leave as well. Like I said, I do not mind my current position, as it provides an opportunity to expand my knowledge, but after a bit I need to get back into my MOS.