Oh yes, I see. he is right. They are 3 cross, no problem.... but they arent "weaved" through the last lace. The first 2 crosses should go over-over and the last cross should go under (or the other way round).
Some wheels are build like this, its easier to do it, for sure. I dont think it will make a massive difference to the strength, as that comes from keeping the spokes tight.