There can be a lot of stuff listed under steps. Freeze (or lock) the row of steps so that as you scroll down to see the items below, you don't lose sight of what the steps are.
Thank you for the idea. Given the low volume of support for this idea, we do not have plans to make updates in this area at this time.
This would be huge. We are trying to make user story mapping core to how we manage our products, and we want to use Aha! for this, but this is one of the main reasons why we are considering just using a whiteboard in an office instead.