Otherwise, I'll try with a more recent version, the 2018
I just noticed that I'm missing a vertical axis, it's an assembly called YD axis while it's not hidden
OK, I managed to open it.
First thing, there are "education" version parts, it shouldn't affect your display problems but it adds a marking on the drawings.
No ghost lines but in top and side view, if you zoom in at best, there is something that is very far to the right: by taking a screenshot in the area concerned, it selects the first X carriage which is positioned at 6659537.59747904mm!
I think the ghost lines should be the volume silhouettes of a component.
You have all the sketches/parts/SE that are not completely constrained. I'd start there: ALL over again so that there is no "(-)" sign next to the name of a component or sketch.
It's a habit to get into, you will gain in performance/stability if you switch to more ambitious asm than this one.
Well thank you, so I'm going to take this assembly and remove a maximum of "(-)"
Besides, I could not remember its meaning.
And what about the assembly that disappeared YD axis?
"And what about the assembly that has disappeared YD axis? "
It is with the corresponding X carriage.