Aussiedistiller, Home Distilling, Moonshine, Home Brew

Hi all. I have got 4 different products sitting on oak at various stages of time. One thing that is really bugging me is i can have the same volume of the same recipe, run off the same batch at the same abv +/- 1%.
I even keep the batches stored in the same spot. I carefully weighout the oak that goes into the jars both before and after charring. Last run when i was blending the cuts i made sure the cuts all went into the one big vessel then i poured it out into its individual oaking jars.
No matter what i do to try and control the process i get one jar that gets dark and changes in flavour quick and the other jar of the same run is light and not quick to change in flavour.
Can anybody tell me how i can fix this please.

Mix them together?

Maybe more helpfully try to use exactly the same wood. Just because it comes from the same bag doesn't mean its the same wood.
If using dominoes use the same split between the two jars.

Is it the same type of oak in each jar? French oak colours much quicker than American oak

The angels just like that one jar better.
What do you want to fix? Is it that ones not dark enough or ones too dark?

As warramungas said, split the one dominoe next time (or use two, split both and put one half of each in each jar). Ultimately it really doesn't matter, just sample each one occasionally and when you're happy with it, take it off the oak, dilute to bottling abv and bottle it. One may well take longer than the other, but that means you've got something to drink while you're waiting for the other.

There's no way Random pieces of wood are going to have the same amount of goodness in them
Even out of a used barrel, it would have been stood on one end for a unknown length of time, one end of a stave would be drier than the other

Problems of the wood hmmm better not let the mrs know about this one.
I just second guess myself all the time with this hobby, thinking what have i done wrong this time.
Thanks for responding to somewhat a silly noob question now i think about it more.
Cherrs.