I'm just reading about Airmiles elsewhere on the web. The thoughts there are that the 100AM for Dollarama that just posted are for July 19th. This would make sense for me because I had to call about DH account to have the 100AM for the July offer manually post as they weren't done automatically. The manual miles posted as missing miles. AM never did post the 1AM for the offer but he's ahead 99AM so I won't complain. He only spent $10 get 100AM for that particular offer.
Someone else on those threads mentioned that they hadn't done the August 30-31 offer so the most recent posting had to be from July. Food for thought.