I just found out about merging accounts and thought it would be perfect so my brother can use the heirlooms that I've unlocked.
My brother lives on the other side of the country but both of our accounts were purchased using the same information.
Right now we can go on each other accounts but each time we have to unlock it from the email.
If we merged accounts would we still have to unlock it through email every time or would we be able to log on with no problem?

You wouldn't be able to play at the same time if there are two separate accounts.

I thought you can because one will show as wow1 and the other as wow2

I'm almost certain that if they aren't the same license (which they aren't since you said its wow1 and wow2) that you would be able to play at the same time. I personally have 2 accounts on my battle.net and have no problem logging in on them

Even if they're being played on different ips? He lives in another state.

Yes he thay can - i can play on all my 6 merged accounts on 1 time no problem

no clue what thay email only you talkabout is ;/