BB Software :: 8520 Won't Find Updates

I have a 8520 Curve, my phone is definitely in the 'Supported Devices' list on the 5, I think it is, update. I'm on O2.

Here's what happened, me and my friend got the same phone, I got mine a few months before her though. I noticed my phone was different to my friends. Like my texts have a completely white background, and it shows texts in a folder, most recent toward the top. And theirs shows the text like a.. Ping Chat conversation? I asked them how they got their phones like that and they say "Oh, it was just like that." so I go to the text settings and mess around with it for a while. Also that their bbm's profile viewer is different to mine, too. And I can't figure it out. So anyway, this friend, her phone was just like mine. Plain texts with white background, my bbm. I was with her the whole time. When we get back to hers to start the phone up and all of that jazz, she gets an update when she plugs it into a laptop (She had the Desktop stuff, her brother had previously downloaded it) After the update her phone was like our friends. I was like "Let me try?" and my phone wouldn't update. So I went home and looked further into it. My phones software is 4.6.1.314 and I'm guessing that isn't the most recent. I notice the "Advanced options - Wireless update" part, I try it. And it says "No updates available" So I try it by going to the 'Software updates' on the O2 website, same outcome. I try the Desktop software again, same outcome.