Hi friend, You can try the following steps:
1.- Try to updated your 3d model.
2.- Try to re-open your template drawing, I mean close and open again, maybe something its happening with some erriors.
3.- Try to have in cat part your file, inside a tree, its must have active in a Body, maybe you have a .solid file, and its not proyecting correctly.
I have one question for you, How did you converted the thickness in a solid module, or in surfaces module?
Have a good day,