Fairly simple - not like an REO or BPO...
So the property disclosure may "innocently" fail to disclose all the facts about the property's condition. They are not trying hide anything... they just don't know. Since you like the house, you should not let this stop you or slow you down. Just do your due diligence inspections and inquiries.
As with any purchase you should fully investigate the condition of the property using an inspector (s) of your choice.
Hope this helps.