Just a thought wouldn't it have made sense to give them all different numbers etc:

T34=.48 ex T34=.48 ex
T35=.55 ex T34.5=.55 ex
T36=.63 ex T35=.63 ex

Such an off the wall idea i know but would have made stuff alot easier if they had thought about it in the begining. For gods sake no one put this idea into practice as would make it even more confusing.