When you change a division template, do all your divisions of the kind using previous templates get upgraded?
the upgrade selection is tuned to the far right button I believe. Though I'm not really sure what the three different buttons do next to the upgrade option but I would guess the far left is turn off upgrades and far right is full speed ahead.
I think that a choice between where the upgrades go - all upgrades held back to be given to new units, upgrades shared equally between units in the field and in production, or new production only to units in the field.
That's just a guess tho.
I think that a choice between where the upgrades go - all upgrades held back to be given to new units, upgrades shared equally between units in the field and in production, or new production only to units in the field.