OK found a small bug. I was crafting the dimlet for void. When I plucked it out of the crafting table I received "Structure Scattered" which according to NEI doesn't have a crafting recipe.
When crafting flat I received void. I just double checked what NEI was telling vs your wiki. They match. So I'm not sure why I'm getting the wrong dimlet. Again, I'm playing with your mod added to the DW20 pack (v1.0.2).
I cannot reproduce this. If I craft void and flat terrain dimlets they just come out as void and flat terrain. Weird...
How did you craft them? What kind of crafting system did you use?
The Tick Cost is the amount of ticks (time) that is needed to build a dimension. The tick cost of all dimlets add together for the total time needed.