Mystery
Are there cases where it genuinely makes sense to have a divider greater than 5 or 10?
It is needed to avoid jerks because of output framerate not equal display refresh rate. If you use ReClock then devider is usually not greater than 3.
You need to look what value has hidden setting:
;Calculation error of smooth factor while ReClock not used when playback: 1 - no jerks (error 0.001 fps), 0 - reduced CPU load and reduced artifacts, jerks are possible up to 1 time per 5 sec (error 1%)
NoJerksWithoutReClock=0