I'm putting this in the White Hat section because this site is about as white hat as it can get. No sketchy practices going on. About 6 months ago we launched an updated version of this website. All page-to-page 301 redirects were implemented, tested, and working properly. Yesterday, I noticed one page was indexed showing the old URL, but when you click on it, it redirects you to the new URL. Has anyone experienced this? Checked the old URL multiple times via multiple tools, all return a 301 to the new URL. This is something I've never encountered before. If anyone could shed some light it would be much appreciated.