Sprite Getting Stuck Problem [GM6-HME], Small sprite gets stuck in ground.

Hey, im making a fan game with Hello's Mario Engine, but its not Mario basted. Its for another site. anyway, i got a problem on my hands. If i get a mushroom and grow to big size, that doesnt have any problems. But when i get injured as "Big" state, the small sprite is created in the ground.

Example: ooooooooooSpriteoooooooooooo

Should Be=__________Sprite___________
__________oooooooooooooooooooooooooo

Legend: o - Ground, _ - empty space

The sprite should just go to small state and NOT get stuck in the ground. Here are the sprite dementions:

Small Sprite: 25x26 [W/H]
Big Sprite: 31x33 [W/H]

Can anyone help?

Make the sprites 32x32 and place the in the center. Solves all problems since the origins would get confused otherwise, which would take a while to edit.

Set the origin of the small sprites to this!

X = 0 Y = -16