Re: Cleveland tickets, while single tickets did go on sale July 27th (with a big *wink wink*), it's part of PlayhouseSquare's usual fun and games.
Nothing at all was available in the orchestra except for the extreme sides, at an outrageous price, when the on-sale started. I checked.
They were probably still sorting out subscriptions at that point.
The general on-sale for single tickets for the rest of the season's shows is September 7th. I'm betting many more "Dolly" seats will be released on that date.
(Also, don't buy into the manufactured hype they create every year the moment the on-sale happens. Wait a few hours until the seating charts get opened up and you can actually choose your own seat).
And don't forget house seats and released subscribers seats always open up a few weeks or days before the actual performances! 
"I'm seeing the LuPone in Key West later this week. I'm hoping for great vocals and some sort of insane breakdown..." - BenjaminNicholas2