Logitech Ultrathin mouse scroll behaviour on mac
Okay, in the case that anybody has the same problem:

Simply download 5.30.150 and use it. It works like a charm
http://forums.logitech.com/t5/Mice-and-Pointing-Devices/T651-Trackpad-and-Ultra-Thin-Touch-Mouse-issues-with-Logitech/m-p/1458806