User blog comment:FairyRaven/Fairy Tail Chapter 369: The Place Prayers Reach, Review and Commentary/@comment-2214433-20140131115402/@comment-76.161.172.226-20140131215539

Not knowing he could move it could easily be explained by it being something he couldn't determine until he actually found Jellal and examined the seal.

Then once he found Jellal, he verified Jellal had the seal, then went to himself "Hey, wait a minute, this thing ain't attached all that tight. I think I can just transfer this thing off of Jellal to myself from here."