First, /NOT signed
There is no reason whatsoever for rogues to gain the benefit of both boosts at the same time. If you want both, then you have more boosts to use between shrines. Good for you. If you don't want both, don't get both.
I agree.
I think the boosts on Human Versatility should all be weaker than their class-based counterparts, but Damage Boost, in particular, definitely needs some reducing. Humans have been the choice for flexibility and options (extra feat, extra skill, choice of stats to boost, variety of boosts, healing amp), while other races have been the better choices for DPS. Humans shouldn't also be at the top of that pile.