Clarke MacArthur scored a power-play goal 14:41 into the third period, and Buffalo extended its winning streak to four with a 4-3 victory against Montreal on Monday night.
MacArthur tucked a rebound inside the right post, giving the Sabres their third lead of the game after the Canadiens evened it twice in the third.
Patrick Kaleta, who scored twice Saturday in a 3-2 road victory against the New York Rangers, had his second short-handed goal in two games late in the second to put Buffalo up 2-1. Tim Kennedy's third goal 12:33 into the third gave the Sabres a short-lived 3-2 lead.
"It was great to stick with it and get the job done," MacArthur said.
"That was one of those nights," Miller said. "I didn't get a ton of work but they found a way to get a few by me. I thought we worked really hard in the second period there to get back into it and get the lead, and the third period was just -- it was just weird."
Strangest of all was the final 19 seconds of the game.
At the 19-second mark, Montreal used its timeout with Buffalo killing a penalty for the final two minutes after Tony Lydman was sent off for high sticking. The scoreboard clock did not begin to run for well over 10 seconds when play resumed.
When a stoppage in play occurred with seven seconds showing on the clock, the referees signaled that time had expired.
"That would have been a heck of an ordeal to sort that out if a goal went in," Sabres coach Lindy Ruff said. "Needless to say, we ended up winning the game and that ended up being irrelevant."
"The one thing you really hate as a team is to give up a goal right after you score, and we did that," Ruff said. "But I thought we stayed grounded after that and went back to work."
Canadiens backup Jaroslav Halak made 23 saves in his third start in seven games.
Montreal is on an 0-2-1 skid following a three-game winning streak.
"We had just scored the tying goal. We had some momentum going," Canadiens coach Jacques Martin said. "I think it's unfortunate because I thought we played a strong game against one of the better teams in the league. We outchanced them, not by much, but I thought our play was much better 5-on-5 and our special teams still did an excellent job."
Kaleta gave the Sabres a 2-1 lead with 59 seconds left in the second. Sekera drew Buffalo even at 12:58 with his second goal of the season three seconds after Montreal's Josh Gorges stepped out of the penalty box.
Kaleta took Tim Connolly's set-up pass on a 2-on-1 and moved to his backhand to put a shot past Halak for his third goal in two games.
"He worked hard to get up ice," Ruff said. "It wasn't an easy goal and it turned into a really pretty goal."
Kostitsyn tied it at 2 early in the third with his second power-play goal of the game, his fourth goal in two games.
Kostitsyn needed only 10 seconds to convert the Canadiens' third opportunity with the man advantage after Buffalo was penalized for too many men 2:26 into the third.
- Kaleta scored his first two goals of the season in back-to-back games from Oct. 13-16 and had three overall through his first 26 games. He now has six goals in 28 games.
- Sabres LW Adam Mair and Montreal's Ryan O'Byrne dropped their gloves at center ice as the puck dropped to open the second. The pair were given fighting majors three seconds into the period.