I'm having trouble with the website too.
I logged in via CTC (which redirected me to GlobalSuccessor) and then it said I had already submitted an application !? My heart skipped a few beats to say the least...
I then logged in via the BA website and everything came up just fine. Only problem is, my application is showing as being "On Hold" and I'm not able to answer the application questions???
I am not sure what to do any help would be appreciated...