It seems to me that they are booking the packages one month at a time - and telling everyone that it may discontinue the next month - but for the past Several months, they keep opening it up for the next month at the beginning of the previous month. (That was confusing!)
For example, I would imagine that the FDP will become available for July at the beginning of June. (I was able to call on May 1st for our FDT on June 10th).
So, for Pyedog, I would check once every other week or so just to be certain - and then every other day or so towards the end of July/beginning of August for Sept dates.
And keep checking the Boards b/c they are always full of more information than ANY one CM could tell you!