It's not your iPad. It's the fact your wireless is not consistently seen. Some routers simply work better than others or are more reliable. Not Apple's fault. It happened to me at my office and I own the place. If you read the IP address is a problem you won't find some magical setting advice here. Have you checked with your IT department or have the ability to switch out the router or change the router settings?
The 169... IP is self assigned when the router does not issue an address and the process times out. Try resetting the modem/router to the factory setting and the iPad as well.
To reset the iPad press & hold the Power and Home buttons together for 10+ seconds, ignoring the red power-off slider, until you see the Apple logo.
Its a huge company and I really dont want to bother them with an iPad issue. I just find it strange that my iphone connects perfectly fine 100% of the time to the wireless but the iPad does not.
I cant re-set any modems/routers here at work. I have tried the Power/Home button shut down and that does nothing as well. I really dont want to re-set the factory settings on the ipad and lose everything on there. Not sure what to do.
I also had this problem several times on vacation this past weekend where it would say it was connected to the internet but would not work. Iphone worked fine. Think I may just have to take it back.