A match between two teams that are currently finding it tough to win predictably ended in a 1-1 draw.
However, both sides felt they could make a good case for claiming all three points.
Orient were the better side overall, noticeably in the first half, but Bury's second-half showing helped them gain a fourth consecutive 1-1 scoreline.
And the Shakers believed their visitors should have played with ten men for the final 26 minutes after John Mackie brought down Gareth Seddon.
Seddon had just put Bury in front against the run of play with his fourth goal in six matches.
However, Mackie collected only a yellow card from referee Carl Boyeson after the Yorkshire official consulted with his colleague.
And it was former Reading defender Mackie who headed in the equaliser from David Hunt's long throw 19 minutes from time.
"I have seen players go in situations like that," said Bury Manager Graham Barrow.
"I suppose it was sods law that the same player would get their equaliser.
"I thought after taking the lead we would go on and win the game and that would have opened up an 11-point gap between ourselves and Macclesfield.
"However, we are edging our way to safety." Mackie's first goal in Orient colours might have arrived in the first half when the Londoners dominated. He put a header wide, Gary Alexander brought an excellent save out of Glynn Garner while Hunt curled a free kick against the crossbar.
"Bury made it more an even game in the second half," admitted Ling. "But on the whole 90 minutes I think we deserved three points.
"I'm not being biased when I say Mackie shouldn't have been sent off. He wasn't the last man and once the referee went to talk to his linesman, then I was confident he would see it the same way as us."