You should have one account only. If you have multiple accounts you steal the points from other people. The second account doesnt make your profile any better, in fact it scores less points than your first account with all the WA.
Ideally, as you get better you would get less WA and TLE because you would be thinking more before submitting code.
My account has many RTE, TLE, and WA. It doesn't affect me. I submit many quick solutions from my iPhone while solving solutions from forum posts, which attributes to many wrong results but my solutions when I plan are much better.
Cheers,
Leppy