I think that is how all of my IT jobs have been. I get more and more dumped on me until I can't take it anymore and leave... and then they hire 2-4 people to replace me and I want to scream.

I saw your other thread - I hope you get the job and I would have similar feelings about wanting to leave if I didn't, even if I enjoyed the job itself. I think it can be hard to get promoted when you are technically competent because they start to think they can't replace you.