[iPhone] I have Decided I Want to Jailbreak but.....

Just needed to do some updates through Cydia. All good now.

 

So I plugged my phone up to my laptop to add songs to it. After unplugging the phone I find that most if the songs I have bought through iTunes have been deleted along with some of my in-app purchases (ex. Mighty Eagle in Angry Birds) and it is asking me to purchase them again. Does this have anything to do with the jailbreak? Anyway to get these things back without paying again?

On a related note, I cracked my screen back in December and the cracks got so bad spreading and glass started falling out that I had to replace it. I did it myself and it's not so bad except 2 things I've noticed.

1. There's like a bright halo on the outer edge of the screen that vibrates or blinks as brightness is increased.

2. My Wi-Fi receiver is not as strong as it was before.

Any ideas on these two issues?

TIA