xyz filters are not snapping correctly

[martemar7]

  Need help.....I am currently working on a 3D model, and trying to use xyz filters in order to draw an accurate outline of the model my working plane.

Whenever I input PL, and then type .XY it snaps to the the correct place.  However, when I choose to enter the value for Z (which in this case is 0) it does not snap to the correct location. 

I use filters on a daily basis, and have had no problems until this morning, and it is doing the same thing on every drawing that I open.  Hopefully it's just a matter of fixing something in my settings.

Any help would be very much appreciated.

Thanks.