Already one of the NHL’s most agitating and irritating sorts, Matthew Tkachuk has been called almost every name you can think of. This one, however, is new — ‘repeat offender.’ It’s a troublesome label for the Calgary Flames and their tenacious teen left-winger, who served a controversial one-game suspension Saturday and has twice now been punished by the NHL’s Department of Player Safety in just 14 months in the league. “The issue from the other night, I disagree with it. I don’t think there should be any suspension,” said Flames general manager Brad Treliving, reacting to Tkachuk’s one-game banishment for his role in Wednesday’s third-period melee in Detroit. “We have seen unsportsmanlike acts in the league — if that’s what we’re calling it, an unsportsmanlike act — that were far greater than what Matthew did penalized far less than what Matthew was penalized … “I don’t see how or why he would suspended for the actions of the other night, but we move on and we move forward.” You’ve probably seen the replay umpteen times, but just in case, Tkachuk’s timeout stemmed a light whack to the leg of Red Wings tough guy Luke Witkowski, at the time being escorted toward the tunnel by a linesman after a fight.