I have never noticed this before, but these are hideously broken.
Let's role with a top-end example.
Some lucky bastard rolls 50 on both Strength and Toughness at the start. He then over the course of the game fully upgrades both, and acquires a suit of Terminator armour with Thy Strength be Legend. This gives him a Strength Bonus of 14+4=18, TB = 14. But wait! He's Rank 7 with the fully upgraded Strength increase Solo Mode ability. This boosts his SB up to an almighty 32. 32+14 =total Carriability of 46.
Extrapolating from the table, this makes him capable of carrying, for a few rounds, 13950kg, lifting 27900kg or pushing 55800kg.
This makes them capable of pushing battle-tanks with a Challenging Strength test, or juggling terminators. They could probably lift a Hive Tyrant over their heads without even a test.
While this is, undeniably, cool, does anyone have a fix, or will I have to deal with an enthusiastic team of Chaos Terminator and Tau Battlesuit tossing players?