I take classes through the Canadian County Cooperative Extension Center(Oklahoma State University). Haven't had any of those things happen to me. Love meeting with the other ladies and exchanging ideas. One class I took was a Broken Star type pattern. The instructor kept trying to stress the 1/4" seam, a must. I finished one part before the rest of the class and she was using mne as an example. I love doing the "Star" patterns and had done quite a few, so I said if your seam on these isn't 1/4 then that kinda throws everything off. The instructor, while no one was looking, said Thank you for saying that. Sometimes they just don't listen to me. LOL