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Here are the Pics. The first is the last level for one of the boulders before it drops into the water. It should be there but its not. Once you drop it to that level from the level above its as if it just disappears. Which is why in the second Pic only one boulder is present blocking the water.
I think I found an error in the game in the Seafoam Islands. You need to use Strength to push the boulders into the holes right? After that you fall through certain holes to the bottom levels to continue pushing the boulders through the respective holes in those levels to finally get it into the...