I bought the mouse in March this year, initially seems to be working perfectly in fact I love this mouse, it's so precise and no lag despite being a wireless mouse, and the battery life is just incredible, buy until now using only one battery now still have 3 out of 5 bars (can see battery life via the Logitech Gaming Software)! Then don't know when start to have this scrolling problem, when I scroll down it will scroll up a bit, this happens the other way too. It happens when surfing the net, or when scrolling through a text file, especially YouTube, you know now at the main page when you scroll down it will load more videos, sometimes it can get quite bad, just suddenly jerk up a bit by itself. I thought maybe my daughter may have damaged the mouse, you know kids very playful, but the scrolling getting so annoying so I today decided to check online for any software or firmware update, I just download and update to latest but the problem persists. I also tried to adjust...