The one catch - if it is a catch - is that if they offer me this job, I pretty much have to take it. If I don't, my name is removed from the admin assistant pool.
If I'm just not offered the position, I'll go back in the pool and be called up next time there's an opening, which will be...pretty much immediately, if there isn't already one.
But you want to take it because you do need a job, so that's not really a catch.
It is good news that you go back into the pool!