Position, footprint and multiplier are separate
An ordinary sticky WILD holds a cell. An expanding WILD covers a reel; a giant WILD covers several cells. A 3x3 footprint is not x9 on a payout. The printed multiplier must still be applied to the relevant winning combination.
The Big Dog House introduces ghost removal, Hot Fiesta moves retained WILD symbols, and Multihold copies progress between active boards. Follow the next screen after the event to see which state actually survived.