Floating Social Unit Jolts to Designated Position Once Reaching Top of Page

Hey guys --

Love how simple the floating social plugin makes it to increase social interaction from my site. Thanks for creating the plugin!

One thing I've noticed that you may or may not be concerned about -- unless it's just something with my theme -- is how the floating social unit moves during a scroll action. For example, take my site wearabl ... I've noted that I want the unit not to go above 100 px from the top, however it seems to do so during the initial scroll (until it hits the top of the page) then jolts back to the 100 px marker.

Kinda buggy in terms of UX in my opinion, is there anything I can do to prevent this jolt that I'm missing? Or is it a custom placement in the php type of solution?