FED: Catch or Homerun?

[njdevs00cup]

Interesting situation in a state sectional final game relayed by a fellow umpire. Batter hits a ball to deep center field, F8 leaps backwards (feet in play when he leaps), ball in the glove, falls backwards through the fence (snow fence) and holds the ball up beyond the fence to show he maintained possession. The ruling was a catch.

From what I was told, the offensive manager argued two points: Since the fielder's feet landed beyond the fence it should have been a homerun and the second point which was argued was that a player cannot move or make contact with a snow fence to make a catch.

Was this the correct call?