By Cleve Dheensaw Times Colonist writer Just when you think lacrosse has turned a corner — a flashy pro box league that plays in NHL rinks and the inclusion of field-sixes in the 2028 Olympics — the old lacrosse of amateur disorganization again rears its head. The Mann Cup, the annual showcase for Senior A supremacy in Canada between the champions of the Western Lacrosse Association and Ontario-based Major Series Lacrosse, should be a highlight of the year. But it has become roiled in controversy before the start of Game 1 tonight between the WLA champion Victoria Shamrocks and MSL champion Six Nations Chiefs at the Iroquois Lacrosse Arena on the Six Nations of the Grand River Reserve in Hagersville, Ont., where all games in the best-of-seven series will be…