It seems rather clear at this point that the “standard rules” which you reference as giving advantages, particularly for understanding, indicate that this idea of using two spaces is what is wrong, not the CMOS, GMOS or the application you are using. The standard is to use one space, not to use two spaces. At least, that is the standard today (and for decades at least).
Personally, I’ve never had a problem reading a work that has one space after the period. I’ve only rarely seen anything published with two spaces anyway, and that usually just makes a work look odd rather than assist with reading. If anything, it slows reading down, but perhaps only slightly.