This is not a mess in german, because it would not be "sie", it would actually be "Sie".
Edit: Typo
Edit: Typo
The only "Sie" in use is the second person singular in formal form (something else English doesn't have) when used to address a person directly.
"Sie können fließend Englisch sprechen und [...]"
Using "sie" to specify one person in german sounds a lot like "pluralis majestatis" to me. Which is sorta like (but not quite) the "royal we" in english
no. we have that too, but it's the second person plural. Nobody uses this any more though because we killed our kings back in the early to mid 1800s :p