Top scorer Andy Bishop had a header which appeared to cross the line after hitting the crossbar.
Ref, Graham Salisbury looked across to his assistant but the goal was not given despite protests from Stephen Dawson and Ben Futcher who were booked.
Knill said: "The ref calls it and there is nothing you can do. We had one earlier in the season when our goalie scooped one out against Wycombe so it evens itself out."
Bury went ahead when Simon Brown carried the ball over the line but the Quakers equalised through Ian Miller.
He became the villain when he upturned Glynn Hurst and Bishop slotted home the penalty before Richie Foran equalised.
BURY: Brown 6; Scott 7, Futcher 7, Sodje 7, Buchanan 7; Bennett 8, Baker 7, Dawson 7, Jones 8; Bishop 7, Hurst 7 (Morrell 6, 76).
Tweet
