Steps to recreate:

  1. File->New
  2. Quest->Misc Data->Warp Rings
  3. Select '0' in "Warp Rings" window
  4. Click 'Edit' button
  5. Set 'Count' to 3 in "Ring 0 Warps" window
  6. Select '1'
  7. Observe warp location is screen 0x00 in mini-map on the "Ring 0 Warps" window
  8. Click 'Edit' button
  9. Click the square for screen 0x0F in matrix or type 0F into the "Screen: 0x" field
  10. Click 'OK' button
  11. Observe warp location is still screen 0x00 in mini-map on the "Ring 0 Warps" window, even though "Scr: 0x0F" is below it


The mini-map on the "Ring 0 Warp 1" is also affected.