Looks to me like it is back focusing. Look at your camera AF micro focus menu and see how to move the focus plane forward. This is explained on-screen in your camera, if micro focus is available; not all cameras have this function.
Compare the numeral "6" and it looks like the rear "6" is a bit sharper than the front one. I think that's "back focus." Personally for testing I prefer to be on a solid surface rather than carpet but that wont matter for front/back focus issues so much.