EGKB, I get the feeling from your posts that you are working on the assumption that learning to fly takes a minimum of 45 lessons rather than the actual case of it takes a minimum of 45 hours of flying. Of all the 'hour' lessons I've had I don't think any of them have been an hour on the dot. You pay for the time that you fly (and more than likely the landing fees)
Lets say you are a natural born flyer and ace every skill, you still need a minimum of 45hrs in your log so it doesnt matter if your lessons last 55mins or 70mins, its what you learn in any given time and what the total flying time adds up too that matters.
You'll find the first few lessons will follow a pattern to give you the basic understanding execution of various skills and manoeuvres but they are just that, basic understanding and execution. Once the instructor feels you have a grasp of what is required, he'll move on but you'll still be doing those things in subsequent lessons.