Re: in or on a table
I frequently find one of my cats sitting on the table. This can make it a bit gross when we find cat hair when the family goes to sit at the table. (I tell her not to, but she acts like she doesn't understand English.) I saw an interesting table once -- the builder had taken things from the sea - shells, rocks, sea glass, sand - and placed them in a thick block of resin which formed the table's surface. That's the only way I can think of anything being in a physical table.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.