ADON On-Call, Med-carts, and Comp Time

I started my nursing career as an LPN for a year while I finished my associates RN 6 years ago. Since then, I have worked in one LTC facility for 3 years, the hospital setting as a tele nurse and travel tele nurse for 4 years. I have been given what I think is a great opportunity as an ADON at a LTC facility, even though I don't have a lot of experience, but I have completed my Bachelor's and am in a Masters program now. My question is about this company's apparent policies regarding on-call, med-carts, and comp time.

I am salaried, so after 40 hours I don't get paid. I expect to need to work 45-50 hrs a week just because of the added responsibility, and that's fine. However, I found out today (three weeks into my new job) that every 4 weekends (from Friday at 3p to Monday at 7a), I am expected to be on-call to handle staffing. That is, I am to take the portable staffing home with me, receive all call-offs, attempt to find coverage for those call-offs, assess whether people need to be called off, and if I am unable to find coverage for nurses, come in and work a med-cart. I was also told that the week prior to that weekend (Monday through that Friday) that I am on-call in the event of a staffing issue to take a cart for whatever shift that can't be filled. I wouldn't necessarily have too much of a problem with that, but this company does not have a comp time policy. So, if I have to come in over the weekend, I am still expected to work my 40-50 hrs during the week.

Obviously, this does not sound right to me, but as I said, I don't have much LTC experience. Is this normal or is this company expecting too much? How should I address it with my DON? I really like my job, but I don't want to sacrifice my family and school to the company for what would end up being paid less than a floor nurse for the hours I am working.

Thanks for any advice or input anyone could give me.

Beth