Correct. All personnel go to the bottom of the list when they return from either a FU or NFU OOA, or accrue a 90 day credit.
Whilst it may appear harsh, it works both ways, and those who for various reasons havent deployed since the last century (and have missed 3 or 4 turns), still only do 4 months and return to the bottom of the list.
Of course not all people who go to the FI are WD's and I take my hat off to your friend who is going there despite her affliction, whatever it may be, however there are an awful lot of our trade who are going there for the 2nd, 3rd, possibly 4th consecutive time.
An ex-drafter (and Mod) told me when I was volunteering for an OOA that he didnt consider people for MPA if they had been before unless they specifically asked for it, as there were plenty of "MPA Virgins around". If that policy is still being practiced, then how is it that the same folk go to MPA?