When Walter's Sea Breeze is first sinking, Andy puts his (left) foot on the hole trying to plug it. The Sea Breeze then starts flooding from two more holes (as seen by the fountains of water) and Andy brings both of his feet to cover those holes but at this point there's no water coming in from the first hole. Is the ship sinking or not?
When Ephram enters the Swans' practice room, they are doing Degages. Since they are wearing pointe shoes, they would probably make some noise. However, they are slamming their feet in to the position and 'clunking'. They clunk when they are doing the swan dance, also. A definite dancing mistake.