were they sweating (minimal okay if no probs after airing them out once) when you jarred? seems like plenty of time for this not to be a problem... if they were, that could be part of it. probably not quite dry enough to be sealed up, if that is the case.
moist buds are a no-no to seal up in a jar, even with a 2way RH pack. temps are just as important as RH when considering impact on evaporation.
this is something you'll gain familiarity. if they are sweating too much, extend drying times for similar density and size of buds in future. if they aren't sweating, it may just take more time. 30-40days curing before i'd start to worry about smell. Though you'll start to recognize that anaerobic microbial growth smell and brown coloring if somethign is off.
while obviously best to be 'otptimal' it's better to err on the side of slightly too dry than any excess moisture before jarring. some setups mitigate this better than others.. anything that refreshes the air or isn't sealed up is probably a better way to go.
A humidor-like setting would be best. maintain temp and RH%. Do you see cigars sealed up in jars? there is a good reason for that. Even so, i also use jars because i don't have a better option at the moment. When it is sealed, you run risk of anaerobic bacteria growing. this is associated with characteristics of schwag weed - browning of weed over time and a bad smell. Perpetual burping needed if you don't want browning weed 6 months down the line or less.
of all the factors, light causes the fastest rate of degradation unless you live in death valley and dry it outside, maybe? LOL
And, if you smoke this within 6 months... you don't have to be as anal about storage as their won't be much time for it to degradate much even in less optimal conditions. The 2-way packs keep the smoke smooth.