I successfully acquired the Bank of America Hawaiian Airlines Card (35k after $1k in spend) and the Bank of Hawaii Hawaiian Airlines Card (35k after $1k in spend).
I was doing the same for my wife just now using the two browser method. However, when the I returned to the window for the Bank of Hawaii application it was the main Bank of Hawaii home page (as opposed to to confirmation that the application was received). I immediately completed another app and noticed that the page re-directs a few seconds after it gives you the confirmation screen. So that's 3 total apps --- two for Bank of Hawaii and one for Bank of America.
Any chance my wife gets three cards (i.e., 2 from BofH)?
Interestingly, the cards for both BofA and BofH are managed by the same card company FIA Card Services. When I applied for both (about 3 weeks ago), I received a phone call asking if the two apps were intentional and whether I wanted two cards -- I said yes and they said no problem. I received both cards and one is BofH and one is BofA. The same welcome packet and details were included with each card.