specific game site gives weird affect. please help me fix the problem.

Hello, this has to do specifically with me visiting a game site, which I have done so in the past many times before. Except now, I get a weird thing occuring. The description of the problem is as follows.

2. I have a weird occurrence with a web site, which I have visited before many times in the past. I recently visited the site in question today, after much time has past since I last visited the site. I did not recall what the site name fully was, but when I typed in part of the sites name into the explorer's address bar, auto filler came up, from my documents. I clicked on the auto filler, and came up the site, but it was from my pc's history. This is where the weird problem occurred. The problem is that my mouse cursor was flashing, and disappearing when I left the cursor in one place. The mouse cursor flashed as I moved it across the screen. The flashing and disappearing went away once I logged in. What I would like done with this issue to find out if the above explained event is a serious problem or not. Either way, I would like assistance on fixing this problem, as it is the first time it has occurred to me. The specific web site I am talking about is http://spinsplace.19.forumer.com. Thank you for your time, and I look forward to your feedback upon this matter.

 

Yes, it has again. It does stop occuring after I log in. Even though it does stop occuring after logging in, since I did not experience this sort of thing before; I would like it if someone could explain why this happens? I would also like to know if this is something to be concerned with?