Complex sentence: Mahaddie kept flying missions into March, but at 58 missions, two short of his stint, Group Commander Bennett called him up from 7 Squadron to Bennett's staff headquarters at Huntington as "Group Training Inspector", a position Bennett had created.
Split into simpler sentences: Mahaddie kept flying missions into March, but at 58 missions, two short of his stint, he was called up to a second job. He was moved from 7 Squadron to Bennett's staff at Huntington (PFF HQ) as "Group Training Inspector", a position Bennett had created.