Actually, in topbars their space is all horizontal, so you don't want them up over the bars at all. I made this mistake at installation and had to sacrifice more brood than I care to mention when I finally had to deal with the mess they made--bridged bars, angled comb....
It really sounds like it would make sense from a Langstroth perspective, but in topbars the bees festoon from the bars while building their comb (hopefully on the guides!) rather than climbing all around on frames.
Walking plow--it is such a bummer, and I had to deal with this in the beginning, too, but I'm so glad I took the advice to fix it right away. These days, it's a joy to open up the hives because they're nearly 100% "proper" bar combs now. Some I completely lost (and propped in the back of the hive until brood hatched out). Others I was able to rubberband onto the bars until they worked it back into the guides. The bees chewed out the rubber bands later.