Update:
More grief from Aeroplan today. Decided to go there (HDY, Thailand) and back via Europe (LH and TG) rather than wait for TPAC UA flights to become available and confirmed flights with via ANA *A tool. Called in and was told flights that ANA said were available were not showing up in AE system. Sigh..... Hung up and found alternatives to flights in question and called back again. These showed up in my ANA _and_ AE web searches. Then I was told one of them was not showing up again (TG921). I refreshed my ANA and AE searches and sure enough I could still see it as available. CSR took about 10mins trying to get it to work, then as I was asking to speak to a supervisor all of a sudden he announced he could see the flight.
These all F AE reward trips are getting harder and harder to book. 2 failed calls and a third one that almost failed. 20 mins on hold for each. This was for Jan-Feb 2012. I imagine our next one in 2013 will be even harder if they are still allowed. Anyway, even though it sucked setting it up, we are very happy now. Thanks again Rexall, Amex and Sobeys!