Yeah, but why not change back when Ross usually took him? Either one of them could have changed to the newer seat that fit.
I can guarantee you that if we didn't have two seats that fit, we definitely would have made a point to change it back.
I'll answer my own question- 3 possibilities:
1) Too cheap to buy another car seat that fit
2) Laziness
3) Part of the premeditation plan.
I agree. But, to get to this part of the question, you have to first get past the idea that they switched the car seats on purpose so they could kill him, in the first place. That's what I understood the OP to be saying and that's where the trip to Alabama and switching the seat for that reason comes in. Stoddard testified about that and must have confirmed the trip, etc. That was my only point