You bumped a 14 year old post.
Ca/mg ratio is just a rough guess. All elements when too high will mess with the absorption of other elements. For example metals are usually toxic because they attach to the areas that Ca usually does.
Too much mg? I cant tell you what happens off hand but there is an element relationship chart out there somewhere.
When it comes to deficiencies or toxiticites, you will absolutely know when there is a problem. Your parameters seem fine.