Did you have your pref as Axis and forget about changing it? if that happens, it would have kept showing up as "pref Axis".
According to the stats, VF-6 has had Axis as your pref side for the last 4 events prior to this one, and in those 4 times you got Axis 3 times and Allied once. That might explain why you get it so much. Its true you did request Allied *this time*, but its simply not possible to accomodate everybody. Of the 43 squads registered, only 10 asked for Axis, 4 said "no pref", and 29 asked for Allied.