as you can see in the picture, I'm getting different results when measuring with/without snap. The last 3 measures do not use snap, while the rest do (either one side snap or two sides snap) The objects are a small cube (1mm x 1mm) on top of a big cube.
It also happens that when measuring, without holding control, from the left edge of the big cube to the left edge of the small cube, I get 1 mm, but when I hit/hold the control key, it automatically changes to around 1.8 mm. The 0.996638 mm uses no snap.
The 2.3768 mm I get when starting without snap and then the end point with snap. The 2.52483 uses snap on both ends. The 1.83096 uses no snap The 1.83705 mm uses snap in both ends.
How can I prevent this? or why is this happening?