Maybe when you went back to the 13th century you took your website with you? I heard the web servers weren't too great back then..
I believe Ed is right. If you brought a media device to the 13th century and logged on, you surely messed with the time space continuum.
Spock has completed the calculations to fly thru space time and pick up Aj. However.. Scotty need to build him a 1 inch transparent aluminum chamber to hold him.