So I tried dropping that part and it seems to inconsistently work. Sometimes it will change the font correctly and other times it will change the font to some kind of random serif font (I've attached a screenshot of what it looks like). Also, if I do get it to correctly change the font, but then I try manipulating the size of the font via the slider in the global font settings, then it seems to reset to that random serif font.
Is this the correct code?
.sqsrte-small {
font-family:'beloved-script';
}