several years back when I worked at sportsmans warehouse and bowtech was going through some major limb problems with their allegiance and Tributes there were several times that a guy would come in during season and didn't have time to wait for new limbs. the Allegiance and tribute had the same limbs and there were several times when we were hard up for replacement limbs, guys didnt want to wait and ended up with allegiance limbs on their tribute and visa versa. Same limbs, different bows, no issue.
This may be the case here, i wouldn't get to worried about it unless you find they are different deflection with one being a 60# limb and one being a 70# limb.