LZW36 Fan Speeds

I have 6 Fan/Light switches on Smartthings. When I try to increase the fan speed, currently set at 66%, it jumps to what seems like 100% at 67%. 66% isn’t cutting it on a warm humid night, but my wife hates 100%. Any suggestions? Thanks!

Most fans only have 3 speeds, so it’ll round to 33/66/100, bumping it up to 67 may actually be turning it on the highest speed? Do you notice a difference if you tell it to go to 100?

Edit - realize this is from the Hubitat forums, but it has a lot more background info -

Probably is 100. Really can’t see a difference. Thanks for the response.