Your facts are a little unclear as to what is going on here. Please clarify why there are 2 promissory notes and explain why you think they have it backwards. What is the property involved and who is the creditor?
The answer to your question is not intended as legal advice or counsel. Because of the minimal facts involved in question and answer formats, the answer given serves as only that. No representation is created by the answer and comments given to an individual question. And you are advised to seek legal counsel in your specific area for a more detailed analysis and guidance on your particular situation.
I agree that your description is too vague to answer. However, a consultation with an attorney usually doesn't cost that much (some will take a look for free). With your short timeline, you need to get an attorney to look at this ASAP.