I usually like to place mine a bit on the higher side. I figure it’s a lot easier to add soil and not disturb the roots, than to have to bring the plant up.
Another thing to consider is that, as the plant grows, the rhizome will too. As they grow, they'll push the media around. As they do, especially with peat, the media can only go so far due to the pot, and will pile up around the plant. With the plant being up a little higher, you usually don't have to mess with it until it needs a repot.
Everything happens for a reason. Sometimes the reason is that I make bad decisions.