County auctions and 2nd mortgages

[Sid Liso]

I am in Florida and I was wondering about the county auctions held here. If a property has a 2nd mortgage, are you responsible for paying if you win the property at auction? I know you are responsible for any liens. Can they auction a property with a second mortgage? 

Also, if you are doing your own due diligence, does a second mortgage appear simply as another mortgage in the county records? 

Thanks