Champion Growth Statistics

In game champion health and armor do not match up at levels 2+ according to http://gameinfo.na.leagueoflegends.com/en/game-info/champions/

Some examples are: Braum has 576.16 health. (+87 per level). At level 2 that is 663.16 health. In game it is 639. Janna has 487.05 health (+78 per level). At level 3 that is 643.05 health. In game it is 603. Braum has 26.72 armor (+4.5 per level). At level 2 that is 31.55 armor. In game it is 33. Janna has 19.384 armor (+3.8 per level). At level 3 that is 26.984 armor. In game it is 25.