I believe that my polylines were saved on the list. I think that they were not saved on the SD card when I saved my points and tracks. It is not so important anyways, I will make new polylines.
The one suggestion that I have though, if there's another firmware update in the future, is the point size. I have the latest firmware installed, and still the point size is needlessly large, even on the minimum setting. The map screen is one large smudge due to the amount and size of the points, unless I really zoom in a lot. I really think there should be a point size setting of 4 by 4 pixels or something close to that. That would be a serious improvement especially where fishing is involved.