The Swans gave up a 27-point lead with just under 12 minutes remaining at home against the Dockers and needed a Sam Reid mark on the line with 15 seconds remaining just to escape with a draw.
But Longmire is preferring to focus on what his side did for the majority of the contest, rather than just the dying stages.
"We kept a really good team to five goals for three-and-a-half quarters and for a 12-minute period we let a team kick four goals on us," he told reporters on Monday.
"You really have to play the percentages at that stage of the game and we didn't do that.
"We just made some decisions we shouldn't have made with the ball in the last 10 or 12 minutes.
"We'll look at that, but we also make sure we look at what we did pretty well; our transitional run (and) keeping a team to five goals for three-and-a-half quarters."
Next up, the Swans face a Collingwood side that impressively ended Geelong's unbeaten start to the season.
Longmire's men finally ended an 11-game losing streak against the Pies in last year's preliminary final at ANZ Stadium, but their last triumph over Collingwood in Melbourne came at Etihad Stadium in 2003.
Their last win against the Magpies at the MCG, the venue for Friday night's clash, came two months before the opening ceremony of the Sydney Olympic Games - almost 13 years ago.
But don't mention any hoodoos to Longmire.
"I didn't talk about it last year and I won't be talking about it this year," he said.
"Nothing changes.
"If we got caught up in that last year we end up going nowhere, so I don't talk about it and it's not relevant to how we prepare internally and to how we play on the weekend.
"They were really good (on the weekend). Geelong were obviously the benchmark up until the weekend and probably still are, along with the Hawks.
"To see Collingwood come out and play the way they did, they were pretty ferocious in the first 15 minutes and played a really strong brand of footy.
"It was a really good performance for them."
