Selecting multiple elements prompts drag

[Jan Mi]

While selecting elements in plan or 3D view it starts to drag objects like if I had extra clicked on the surface to start dragging it. It happens with Magic mouse and usb optical mouse. It did not happen with my old computer and its driving me crazy.

p.d. I have bettertouchtool installed to enable middle click on magic mouse

[Jan Mi]

please help, I attatched a video of the problem, in between each selection it prompts drag and I have to press escape to make the next selection.
View My Video


Edit: ejrolon figured it out, sticky keys was enabled in the accessibility preferences under mac's system preferences. Thanks.