You're reading it wrong.
Notice no rankings beyond the top 3?
Click on Tyler, see the grade of 62.9?
Underneath it says 52nd /76 T?
That means he currently ranks 52nd out of 76 Tackels.
See Neal? He's not the #4 T, his 49.8 score is ranked 72nd of 76.
That means he's currently one of the lowest rated Ts in the league, he's not ahead of Tyler, his score is much lower.
Lael is not #8, he is #68 of 76.
And Tyler's 62.9 is not ahead of Sewell's 77.7 (currently #11,) or Lane Johnsons 78.2 (currently #10), even though his name is listed before theirs.
You gotta look at each player's score.
Tyler is having a solid season for a Rook, espexially at LT, but he's not the #6 rated T in the league right now.