Went to my FIRST sheriff's sale. Some follow up questions

[Adam Craig]

I am new to sheriff's sale but not new to real estate. I have purchased dozens of home without interior access through auction.com, hubzu, xome and I know there are guys making a living at the courthouse steps so I finally decided it was time I start going. 

I went to my first sheriff's sale to listen and learn but here are some follow up questions.

1. I told one of the bidders there which houses I was interested in. He said the bank will probably buy that one back. Does that mean some of the bidders down there represent the bank or the bank just has a reserve.

2. I heard a couple people open the first bid up with "Plantiff" - What does this mean.

3. Lake County Ohio starts the bid at 2/3 the listed appraised value. But sometimes the listed mortgage is considerably higher then the ending bid. Does the bid need to reach a minimum of the listed mortgage in order to sell?

4. On the property page link below - there are 5 categoris for the status of a given property. ACTIVE/CANCELLED/BANK/PRIVATE/BANK PLTF - What does bank,private, and bank pltf mean?

https://webapps.lakecountyohio.gov/Sheriff-Sales/