how can my property have 2 liens against and I don't know?

[Elizabeth J Humphrey]

So here is my story, I have owned my home for the last 17 years and have refinanced at least 5 times in those 17 years. The most recent refi was actually to acquire an equity line of credit, basically because we owed only about 70k at the time of refi it became an equity line not really a mortgage per se (equity line =115K and we had 45k available credit as we still owed 70k on the home. So now I am going through the process of increasing the credit line in order to invest in income property and get a call from the mortgage lender (the same one that gave me the equity line 2 years ago) that there are 2 liens on the property and the companies have both held a mortgage on this house (ie my mortgage was sold many times). I have excellent credit, no outstanding loans or ex-husbands or kid's college loans, so I wonder how this information came about? The title was just searched 2 yrs ago with the last equity line. I have been able to speak with the mortgage lender as of yet. I just can't get my head wrapped around this, since this is my only property I have ever had a mortgage on. Anyone have ideas or had a similar situation come up?