BB Torch :: 9810 Track-pad (trackpad) Or Screen?

I bought a used 9810 for a decent price, it was listed as *mint* and the cosmetic condition I'd say would be at best very very good (it had a lot of gunk under the case they had on it, I had to clean it for them).

So anyways I got it all set up I tranferred all my info from my older Torch 9800, then I pulled the 9810 out of my pocket and it was flipping through "All" "Favourites" "Downloads" "Frequents" and all of those. So I was obviously confused.

After using the phone a lot I realized that it's just the "cursor" or the pointer that is moving quickly to the top-left of the screen. If I'm on the internet I see the little pointer icon moving to the top-left corner. If I'm on anything like the main screen or blackberry app world there is a flick to the left.

To see exactly what I'm describing look at the video --> Here <-- please.

I think this is the track-pad, some other people on crackberry thought it was the screen, so I would just like to know which it is. Because this is a used phone, I do not know any of the real backround of it. I was told it was well taken care of.

Is there a simple way to fix this? (Factory Reset) or would this trackpad or screen need to be replaced?