Redhill's last-gasp winner on Saturday condemned the Lions to their fifth defeat in a row.
It was bad luck on a Lions team who showed a spirit that had been lacking in those previous weeks.
With injury and absentees robbing Gary Block of his preferred line-up, he was again forced to shuffle his increasingly-threadbare pack.
Rob McLelland took over in goal, with Lewis Gibbs replacing the injured Michael Frangou up front.
The Lions could have gone ahead as early as the first minute but Rob Wimble saw his shot spin away from goal.
Pagham had made all the early running but it was Redhill who went ahead just after the half-hour as Billy Jackson headed home.
Sean Dobbs saved Pagham at the start of the second half, getting back to block Jackson after the scorer had skilfully jinked his way into the penalty area.
Ashley Hunter’s efforts were rewarded just after the hour when confusion in the goalmouth allowed him to hit home his third goal of the season.
Lee Bradshaw was next to take aim at goal following another good Lions build-up.
A shot from Lewis Gibbs had goal written all over it until Redhill keeper Czanner’s athletic leap to his left tipped the ball out for a corner.
Brett Forden then saw his header cleared off the line and Wimble was denied by Czanner.
On his 20th birthday Keiron Urquhart got a card from the referee. Unfortunately it was yellow as he was booked for dissent.
Just as Pagham looked to have got the draw they deserved, mistakes in midfield allowed Wayne Robinson through to score an easy goal.
Pagham: Mclelland, Urquhart, Bradshaw, Dobbs, Heller, Hunter, Britton, Angell, Wimble, Gibbs, Forden. Subs: Peach, Cox, Green.