You wouldn't be able to see the actual size of your balcony if you are just looking up at your unit. The builder wouldn't change any sizes without speaking with you. You should call the customer service department if you have any concerns.
Not everyone from tower 1 will be moving in September. They are going floor by floor. Natalie was the girl you probably met. Emerald City Customer Care office has been set up 416-492-7773 for any info.