I extracted two batches of honey about two weeks apart - all capped - one was thicker than the other - is this normal?
OH yes. They can change flowers three times per day. And the difference in flowers can change the nectar which changes the honey that much. For all I know the temperature could cause them to change the enzymes they mix in the honey. Or maybe they changed channels on the radio.
Things change and we may never know why. Just enjoy the honey and the search.
The main difference is sure to be the water content
unless one has some unusual or obscure nectar
I'd test the "thinner" honey to make sure that
it is not too "wet", as this could be a problem
(fermentation). If you have one batch that is
"too wet", and another that is "drier than it
needs to be", you can blend them to get honey
that is "just right".