I haven't folded it before, but just looking at it I can already tell you that there are several missing creases. Wherever 2 diagonals and a vertical line terminate at a horizontal line, there should be a crease going up from there. I hope this helps a little bit, if for nothing else than to reassure you that you aren't crazy.
No-there are creases missing. It is impossible to fold flat when there are intersections with odd numbers of lines or intersections where the difference of mountain and valley folds is not 2. There are plenty of such intersections in the CP.