A notary cannot witness his/her own signature; therefore your concerns regarding the the will are valid. If such is the case, then the notary is probably still valid, but there will only be one witness considered to have witnessed the document (the notary witness would not count). Therefore, if your state requires two witnesses on the document, your will would not meet those requirements. As for the notary serving as a witness and also notarizing your signature within the same document, I have cause for concern there as well. However, it is impossible to provide you specific guidance without reviewing the documents personally. You should have an experienced estate planning attorney review all of your documents to verify whether they are appropriately executed or if there are issues.
The comment provided above is intended as general information and IS NOT LEGAL ADVICE. You should consult an attorney for advice regarding your individual situation. If your question concerns an Estate Planning, Elder Law, or Long Term Care Planning matter governed by the laws of the State of North Carolina, please contact me for personalized service. firstname.lastname@example.org (910) 762-1577.