About the current floor on Aug 8:
"As Stantec Tower continues to climb towards the sky, designers and engineers are busy ensuring it will be able to withstand both the elements and its own weight...currently being installed between the office and residential portions of the building, outriggers made possible the advent of supertall skyscrapers in cities like Dubai, Hong Kong, and New York.
Construction on other portions of the building has come to a halt while shipments of the trusses arrive over the next two weeks. They are being assembled in-shop in Quebec, disassembled, shipped to the site, and then ensconced within the concrete above the 29th floor.
Handling these structures is no easy task: every metre of the material weighs 1,000 kilograms—that’s about twice as heavy as a grand piano. Staff are working day and night to get the parts in place efficiently and safely.
Another round of the outriggers will be placed on the top of the Tower, to add extra stability. "
So it's possible the outriggers are taking longer than expected, or there are other delays associated with it, like archited suggested. It does sound like this should have only been a 2-3 week process