It really doesn't surprise me about Wells. I have a number of questions I would need answered before I could give an answer. Is this in foreclosure? Is that why you are seeking the original documents? Did you get the documents you requested through a "Qualified Written Request"? Do you have any of your own original documents?
Please post again and there should be some ability to get you some answers.
This answer does not constitute legal advice and does not and is not intended to create an attorney-client relationship. The law may vary depending on the state in which you reside. It is intended only to give some direction in which to seek assistance.
This needs to be reviewed from the viewpoint of consumer protection and real estate laws. Without examining documents, however, it would be difficult to give any opinion. If you have not been represented to date, you need to arrange to get the documents in for consideration.