Math is So Hard!

I noticed after I got my QNAP NAS working with Time Machine after upgrading to Mountain Lion that the backup progress information shown when clicking on the Time Machine icon in the menu bar is way off.  At first I thought Time Machine backups were running extremely slowly in ML but it now appears that it simply isn't reporting the amount of backed up data accurately.  Combine that with the negative countdown during installation and reports of inaccurate battery info on MBPs and I have to say it must be true what they are saying about the current state of math education in the U.S.

It's fine if numbers greater than 20 is shifted, but this doesn't work for me.
NOK means that LR doesn't accept my input and the aspect ratio is not changed (nothing happens).
OK means that my input is accepted and that the aspect ratio is added to the list (it would be nice to be able to name the new ones),
Some tests:
1,5x1                      NOK
1,234x1,234            NOK
6x3                         OK
20x20                     OK
20x25                     NOK
40x7                       OK
8,5x11 (predefined)  OK
Also, 1280x1024 is more like 5x4 than 4x3.
Thanks!
Martin

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