I hope that it is not too late because I am answering this question after Tuesday at 9am. I think you are doing the right thing by telling the Sheriff that your 18 year old daughter was not served as part of the foreclosure. If there are tenants in the property, the bank is supposed to evict them separately and provide new notice of the eviction. Otherwise, if you have already been evicted your recourse is to file an action for wrongful eviction.
The information in this answer is not intended as legal advice nor do I intend to create an attorney-client relationship with any reader simply by answering this question or contributing as a member of AVVO.