Under Racial Abilities, Size+1 gives [Size+1, Toughness +1, Strength +1d].
It should be only [Size+1, Toughness +1].
The rules say "Size +1 (3): The creature is larger than normal. Each point of Size adds directly to Toughness and increases maximum Strength one step"
That increases the MAXIMUM racial attribute value but does not give a free increases a starting value. For that Attribute Increase ability is used instead.