Reply to Button Options Set to Value 0.2,0.4,0.6,0.8,1.0

I'm trying to figure out how to set up a beatmasher like in Ean's video, and am trying to do it in a dedicated effects deck of 3 beatmashers, all at different values. However, in trying to map a button that sets them all to appropriate values (1/4,1/8,1/16) so 0.5, 0.7, 0.9 or whatever, I can't do this for some reason in the Set to Value under Button Options in a Direct mapping. Would someone help me out with being able to change the value of the button to whatever I want.

Also, when I map a button to simultaneously turn an effect on and enable that effect in that deck, there is about a half beat of lag (I do this for the beatmasher, so I need to press the button about a half beat early in order for it to engage on the beat I want).. Hardware problem or is it just a bad mapping?