you dont think it could just be a different phenotype? if the genetics are not IBL enough than the different phenos will be more prominent.
sometimes you get seeds that are runts, some might smell different, some might have a different appearance all together... the only way to insure that you have the exact genetics you want is from cloning..
for example the "original cheese" is a clone only strain because its offspring usually does not have the alleged cheesy smell to it....
but you may know this stuff all ready
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ohh ya, your plants look great, thanks for the update on the pics bro