nice looking table
I think you've done everything possible to prevent movement.
What I don't know is the type of post? I assume they were pressure treated? Those are generally so wet they need a long time to dry out because of the process used to treat them.
As long as you have sealed both sides of the table they should dry more or less evenly. The ends will probably check in my experience, and there's not much you can do about it, except seal them real well. Time will tell, but I would expect some cracks to form as they dry out.
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)