land use vs property class vs zoning use - help!

[Albert L.]

Bit confused here. 

There's a property we're looking at that has 2 separate buildings on the same lot - 1 duplex (3BR/1BA upstairs, 3BR/1BA downstairs) and 1 SFH (2BR/1BA).

They are next to each other in the same vertical line. 

When I looked up the records, I'm seeing 3 different terms that I'm trying to understand from a legal perspective. This would be a potential buy and hold property but would still be good to know in case I do get in a situation where I need to sell. 

Land use: 5300 - 3-FAMILY PLATTED LOT

Property Class: THREE FAMILY DWELLING

Zoning Use: TWO FAMILY

I've heard to just stay away from these types of 2 buildings on 1 lot deals but I can't help my curiosity to understand how this works. 

Thanks BP! 

Albert