Ocean monuments ignore sea level
What I expected to happen was...:
I was hoping to find a completely empty and unsurrounded-by-water ocean monument if I set the sea level to 1.
What actually happened was...:
I created a "Customized" map, setting the sea level to one and the biome to Deep Ocean only to make it easier to find an ocean monument. However, the ocean around the monument, unlike the rest of the ocean, was still there.
Steps to Reproduce:
1. Create a "Customized" world.
2. Set the sea level to "1"
3. Set the biome to 'deep ocean' only. This might not be a necessary step, but makes it easier to find the bug!
Possibly WAI, since villages always are surrounded by air. If you really want to remove the water, use MCEdit.
Edit: I wouldn't use sponges. Updating the water might make an even bigger mess.
If not WAI, Confirmed.