This issue seems to be fairly random, I can't seem to reliably repeat it (it occasionally happens, but doesn't always happen).  When performing a loft cut my resultant face edges become splines instead of the edges of the sketch being used in the loft, which we have to then correct.  I'm trying to figure out what may be causing this issue and if anyone has had experience with it and knows of ways to avoid it.  In my most recent case I imported a part (to base sketches on), created a solid block to cut the loft into, converted entities to make a sketch of the part on the block, closed sketch, opened a new sketch on the opposite side of the block, converted entities to get the same part in a sketch on that side, scaled that sketch up, then lofted between the two sketches.  Both sides of the block are now split into 2 spline features on the face instead of the individual entities and these 2 spline features are split where there's a little line indicating a change of contour within the part's loft.  As I said, I can't reliably repeat this situation and I can't share this specific file due to it being work related, but I'm curious if anyone else is having this issue as it's important for my business to avoid splines at the time.  I wasn't able to find anything with my Google-fu or this site as of yet unfortunately.  Thanks for any assistance you can provide.