Links to Twitter are not processed(? crawled?) correctly

There’s two parts to this:

1. Some Twitter URLs(the current one is to a list in someone’s account) are reported as 404 even though they’re not. Navigating to the URL works perfectly.
2. I have about *1,000* Twitter URLs(to individual tweets as well as profiles) that’re in the Redirects tab whose status is nonetheless listed as “200 OK” and aren’t redirected from the original URLs in my content in the first place.

I have no idea what’s going on.