But perhaps rjohaire is thinking you get that same 10% boost to the runner regardless of which arm is in RF. So I can see some validity to saying it does not matter that much.
Though since the way I perceive Strat to work the arm rating mostly functions to determine how often an extra base is gone for and not how often an OFer throws someone out the stronger arm in RF keeps that aggressiveness more balanced and in check. So agree with Ragnarokpc it matters.
Unfortunately, looking at roster here is what I think is happening. When I look at the card of Colavito I see LF listed first, which could be interpreted as that being his primary position. Maris on the other hand has RF listed first. So the swap of OFers is HAL trying to get the players to their primary positions.
Now clearly that is not what you want. I would call that a bug but that is likely to get your entire thread deleted so I will not say that.