Architect Archive

I was looking at some of the recipies for architect buildings and I was noticing some unusual discrepencies. All of the large harvesters use about the same amount of resources as each other (except water harvesters, they use a lot less). However, medium harvesters have some wierd jumps. Both the chemical and flora medium harvesters use quite a bit more resources than the other mediums. The chem extractor is around 12k resources and the flora one is around 22k resources whereas the other mediums are closer to 4k. What's with the wild jumps in these recipies? Are these intended? I noticed that the expensive ones use wall modules where the cheaper ones use structural modules. I'm thinking it's possible someone entered the wrong type of module in for a couple of the schematics.

Is this intended or is it a bug? As it is, medium chemical and flora extractors are hardly worth the money. I'd have to charge 60k just for a medium flora extractor and that's plain nuts.