First, Skritter has the traditional form of "游泳衣" listed as "遊泳衣", but it should be the same as the simplified version.

Second, there is no way to give feedback on words from the "word card" that you get by clicking on a word from your lists (or elsewhere)

Evan changed it to 游泳衣 yesterday, before you posted this--I wonder if you saw a cached version of it somewhere. The fix should propagate soon.

High on our todo list is a unified interface for handling corrections which will be available from the word popup, which will make it much easier for you to submit (and for us to process) corrections on whatever part of the word needs attention.