1. Then it's not an anagram by definition. You should explain what an anagram is and create a new definition for this case.
2. There is no need, that is an example in the description.
3. Maybe. But exactly the same letters gives the idea about the same amount and that's not true. What do you think of what I suggested at the end of my previous post?
4. Sorry, I don't see the other messages you're talking about.

No, because the strings are not anagrams (an anagram contains the same amount of letters), see the examples:

findUniq([ 'Aa', 'aaa', 'aaaaa', 'BbBb', 'Aaaa', 'AaAaAa', 'a' ]) === 'BbBb'

All strings contains similar letters except one.

That description is fine. Or maybe it should say the same letters if you ignore repetitions and capitalization?

That's actually so inconvinient! Can't it be moved to somewhere more accessible?

Go to View Profile. In the section that says "Earn extra honor and gain new allies!", click the "Learn More" button. This will reveal your referral link.