Editing Numbers

Hi ... this is something that bugs me every time I hit it, and it is what feels like a non-standard intrusion by MS into the process of changing a number in a dialog box. The one I hit it on is Format > Page Settings > Scaling. What happen is. for example, when I want to change from 1.700 to 1.800.

1. I place the cursor to the left of the 7.
2. I click delete.
3. I expect the 7 to be gone and the number to be 1.00 but instead I see 1.000 (three zeroes)
4. I type an 8. I expect to see 1.800 or 1.8000 but instead see 1.000

The essence of the problem is that MS is zero-filling the number to be #.### as soon as I delete the 7 instead of waiting for focus to go elsewhere.

The workaround - which is easy but I am old enough to not remember it until I do the what is to me the logical sequence of steps 1-4, above - is to put the cursor to the RIGHT of the 7 and use backspace.

If this could get on the "trivial things when some has a few minutes" list, I would certainly appreciate.

Thanks!