I found this https://forum.solidworks.com/message/38364#38364
but the 2 suggestions there didnt work:
1. save as eDrawing, making sure "save shaded porton is checked."
2. hit play buttom first, then rotate will not be greyed out. True, but the
drawing still cant be rotated to long-ways vertical and the rotate button
doesn't seems functional even though its not greyed out.
I have seen some bizzare things from computers over the years
so what I am going to suggest wouldn't suprise me if it worked.
In Autocad, did you zoom extents before saving it out?
If not try it and see if it comes in edrawing better.
Also, is this only doing it on your machine or are others experiencing this too?