Why is twitter doing this? URGENT Please

So I had a twitter account a while back and I had the app on my phone. I deactiviated the account and haven't used it in a long time so it got deleted. I recently made another twitter account, so I bought the IPhone app for it. When I opened it up it just brought me to the account I deactivated a while back. Why is twitter doing this and HOW CAN I FIX IT?

I'm using a ton of data on my iPhone 5?

I just got the iPhone 5 about a month ago. I used up 2GB (half of my shared data usage) about 2 weeks ago which seems fair considering I wasn't hooked up any Wi-Fi. (I was on vacation.) Anyway, I was hooked up to Wi-Fi for 2 days and went 3 days with LTE and it seems that I used up an additional 25% of my data! That seems ridiculous! I have since connected to Wi-Fi and shut my phone off whenever I'm out. I've looked around and people have said that I need an update that pops up when I go to General>Settings but I haven't seen it. I need something quick and easy.

IPhone 5 with no service plan? International SIM?

I recently lost my iPhone 5, but I happened to have found it today. I already bought a new iPhone 5, so my old one no longer is activated/serviced by my carrier (Sprint). I'm leaving the US to Hong Kong for a couple of months so I was wondering if my previous iPhone is now unlocked. If I inserted an international SIM card into my old phone, would it work?

Sometimes I think the camera just hates me to death?

Well I'm a dude, I haven't changed my facebook profile picture since 2010 and I'ts a grupal photo so nobody can see who I'm actually, so yesterday I tried with a little "session" and Before it I went to the boys bathroom and I thought that I looked kinda sexy and I was so comfortable but when she gave me her iphone to see the photos literally I was in shock, I was like a mosnter like with too many noses and three ears, or someone like johnnie baima, but less hotter than, you know… So I said to myself, why do I always a monster in photos I can't smile when It's about school photos for example, like I literally cry all of my school photos are so horrible that I feel ugly, and my mom print those photos and I just hide them when visits come! I need help so bad! Why can't I be normal? Why can't I be as photogenic as the others?