It's only a 15 minute halt. So if you hit 7% and trigger L1, trading is halted for 15 minutes, but then it resumes. If it drops down to 13% another 15 minute trigger happens.

But each of the L1 or L2 can only occur in a single day, not one or the other. You can hit L1, and then later hit L2, but you can't hit L1 twice.

Does that help clear things up?