Jonathan, You may believe the online records to be complete and accurate but Abany County NY doesn't seem to share your confidence.
From the Albany County Website: https://access.albanycounty.com/clerk/deedsandmortgages/clerkhelpdesk.aspx#disclaimer

With respect to documents available from this online system, neither the County of Albany nor the Albany County Clerk, nor any of their employees, makes any warranty, express or implied, including the warranties of merchantability and fitness for any particular purpose, or assumes any legal liability or responsibility for the accuracy, completeness or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.