Target does seem like it takes advantage of availability though. I started a thread about a week ago about how Target is scheduling me for many more hours that I wanted. This most recent schedule that came out is about 10 hours more than the maximum that I said I was willing to work. This "creep" of hours (starting at 13, then 23, then 25, then 34) is, in my opinion, taking advantage of me as a worker and if I were planning on staying long term would absolutely warrant a discussion with HR about how to solve the problem.
Remember, you let people take advantage of you. You just have to decide where to draw the line.
Don't worry. In about a month and a half, you'll be back down to 8 to 12 hours a week.
But it shouldn't happen at all. If the understanding was that I was hired expecting 15 hours a week, then that's the understanding. However, I am in the exact same position as Joel. I have not said anything to HR and by not saying anything, it's the same as acceptance.
HR might even think I'm excited to get these hours; they aren't thinking about the fact that I am unhappy because I'm missing dinner with my siblings, my son's two soccer games, my daughter's band concert, and that I won't be around for most of my daughter's sleepover birthday party (I'll get home about 12:45 am). And they aren't thinking that if I was scheduled for 15 hours for the week, it would have been impossible for me to miss all of these events. It is, however, up to me to draw the line and since I expect to be at this job for only another 3 weeks, I've weighed the pros and cons and have decided to just work the hours. And, yes, I have tried putting shifts on the swap board - no one wants to work weekends or close on Friday, Saturday and Sunday nights, that seems perfectly clear.