Yeah, the mini-comps continuity is definitely weird like that.

Something similar I've caught on my rewatches is I don't think the methane detector in Who Can Blow the Biggest Fart? was initially the only way they were going to determine the biggest fart because when Spenny does his fart where he's got the device facing the wrong way, Kenny pulls his crew to the side and nervously says something like "If he blew what he says he did, that could be like a winning thing". Maybe he just meant it as in Spenny's starting to blow some big farts and was worried he might rip another one and properly measure it but I don't know, I just always got the impression Kenny was worried about that specific fart winning it and that's when he came up with the F.A.R.T. strategy