Speedfan weirdness?

[soulesschild]

When I use speedfan to regulate these fans, the RPM readings go nuts and the actual fan motion gets....interesting? hard to describe, i hope u guys know what im talking about, like its not a consistent blur anymore, but you can kinda see the fins. is this normal or a problem? is this because the antec fans have a mini button kinda controller thing on it that has three settings? lo/med/hi?

This problem does not appear on my Zalman, you see the correct dropping of RPM.

 

[MrPatate]

imo, if the speed is set at minimum on the fan LO/MED/HI setting and you almost give it no juice on the front fan controller yes it's normal.