Check this out:

Thank you for your e-mail. I apologise for any confusion, however you have made $600 in deposits and received $150 in bonuses as per the promotion. Bonuses are not stackeable (i.e. you cannot receive both an initial deposit bonus as well as a TREAT bonus - only the greater of the two), therefore you cannot receive the first deposit bonus in this case.

This is NOT the last they will hear from me. The TREAT bonus is up to $100, so how is my pending amount $150. Not happy right now, as I even emailed support beforehand to make sure these bonuses would indeed stack.