BAT not showing up when key is restored to another browser

When I backup recovery key on on pc browser and restore it to another browser the BAT is missing or the balance is wrong. I do not have an uphold account and did not think it was necessary.

I read that when one recovery key is restored that it deletes previous wallet. Is importing the exact same thing as restoring or does import add the balance to existing wallet balance?

If import and restore are identical, how would I merge funds from multiple wallets and browsers into one?