Once again it is YOU who is missing the point.
I refer you to the original post.
Does anyone know if you can re-enter Poland with an expired ... I have an American passport.PLEASE HELP.
My point stands.
The issues are nothing to do with Polish immigration either leaving or re entering Poland.
I suggest some comprehension lessons. The issue is entirely related as to whether he can re-enter Poland after his trip abroad.
Post 6 is entirely relevant depending on which country in January 2016 is being visited.
It absolutely isn't. The only thing that the other country will check is whether he can legally enter Poland upon arrival. He can (as he holds an American passport and thus has 90 days visa-free regardless of the stamp in his passport). Therefore, it's a non-issue.
Let me leave it at that and my 35+ years of experience doing my job.
If you work for the UK Border Force, then it's no surprise that you haven't got a clue about how Schengen works.
Why does it matter what country i am visiting? The country I am going to does need me to get a visa for entry.
Ignore him. It's absolutely irrelevant.
Basically, once your student visa expires, you have 90 days in Schengen "visa-free". The clock will stop when you leave, and re-start when you enter. After you go over 90 days in Schengen (in a 180 day period), you won't be able to visit other Schengen countries while waiting for your temporary residence card, but your Polish clock stays on Day 1 as you've already applied for the residence card.
In short, you're free to come and go.