(Note i use capture tool from win7 so cant capture mouse with it)
Didnt understand exactly what you said but:
If you speaking about convert mouse location problem here : (mouse is on top of the sphere while it is printing the the mouse location and world location for sphere)
If you speaking about the first problem with hit location: ( you can see how the vector change after that i moved a bitttttttt the cursor from floor to the cube)