When Granny is sitting in the billiard room by herself, the table is a billiard table (no pockets). When the entire family is there, it has changed into a pocket billiards (standard pool) table.
At the end of the episode, Jed and the widow Poke are dancing, and Jed asks Granny if she wants to go grunion hunting that night on the beach. In season 9 they don't know what a grunion is; they think Grunion are a war-like people from the Isle of Grun.