Hi Sarah,
This is certainly not a dumb question. You are smart for doing your research and your due diligence. This will certainly help to insure that you do not make any costly mistakes since buying at auction is a high risk/high reward proposition.
You would want to check for reconveyances and subordinations to determine the lien position. You can access the information through the county recorders office, use your local title company or use online services like propertyinsight.biz. Some investors hire people with title experience to check the title prior to sale to verify the lien position and look for any other title issues like IRS Liens.