Glenavon captain Kris Lindsay says his side need to sort out their disciplinary problems.
The skipper was speaking after his club learnt an hour before Friday night's clash with Institute that both Andy McGrory and Gareth McKeown had been handed four-match bans for their part in last weekend's fracas at Dungannon Swifts.
McKeown had to be withdrawn from Glenavon's line-up but McGrory's name stayed on the teamsheet.
"They were both sent off after the final whistle at the Dungannon game," explained Lindsay.
"I'm not sure if the club are going to appeal the bans but that's about as much as I know at this stage."
Their suspension issues worsened when James Singleton was shown a straight red card for a last man tackle on Paul McVeigh in Friday's 1-1 draw.
"Personally I thought it was a little harsh," added Lindsay.
"I can see why he sent James off as it was quite close to the edge of the box.
"For me Winkie (Murphy) was pretty much level with him in the middle of the goal and was going to make the cover.
"It's something we need to look at, the amount of red cards we have received for basic, stupid things and showing a lack of discipline.
"We need to stamp it out because it's going to cost us big time. At the minute we'll be lucky to have 11 players for Boxing Day."
Institute, meanwhile, will feel that they should have taken all three points from their trip to Lurgan.
Glenavon had most of the chances in the first half but looked toothless and were ultimately punished by Stute's Stephen O'Flynn.
Singleton fouled the striker on 55 minutes and O'Flynn, who was being watched by Linfield boss Warren Feeney, curled the resulting free kick around the home wall and into the net.
The hosts were rescued by Gary Hamilton five minutes from time, the player-manager tapping in after Ciaran Caldwell's initial effort had come back off the post.
"We had chances when it was 1-0 to make it 2-0," reflected Stute boss Paul Kee.
"If we had made it 2-0 I'm not so sure Glenavon would have got back into it.
"It was a very open game, Glenavon had chances and we had chances.
"We set up to play an offensive gave and sometimes that can leave you exposed but it worked well for us.
"We defended very well and it helped us remain in the game. With seven minutes to go we were fairly well in control but Gary Hamilton is a predator, an experienced striker and he has punished us."
THE Irish Football Association are today expected to make a ruling on Glentoran's protest against Gary Hamilton's participation in Glenavon's 4-2 victory at The Oval on November 8.