Totally normal. Handwriting can be affected not only by pure fine-motor coordination skills, but, even more importantly for dysgraphics, deficits in automaticity. It's not necessarily that they can't physically form the letters, it's that they have to draw the letters consciously every time, rather than thinking about the language they wish to communicate, and letting background processes take care of letter formation, spelling, and mechanics/conventions. NT writers don't -draw- letters, we -write- them.
