Wrong Font Spacing

I have the following text block

[object!3!number!element] = NULL,
[object!3!facetid!element] = NULL,
[object!3!facetclassification!element] = NULL,
[object!3!efxpath!element] = NULL,
[object!3!ledgercode!element] = NULL,
[object!3!accountid!element] = NULL,
[object!3!analysiscodes!element] = NULL,
[object!3!amount!element] = NULL

In SyntaxEditor if I use (Characters in Tabs = 8) a font of Courier New 10, everything lines up properly. However, if I pick Courier New 8 or Courier New 12, the spacing gets off, but since Courier New is proportional, the spacing should remain the same.

Any ideas why the spacing gets off when not using Courier New 10?

Thanks