2- If you do not have any application with the Foreign Office pending/waiting for decision when your card expires, the practice is that you need to leave the country.
Thank you for the information. Do you mean that I must leave only Poland or all of Schengen? Basically I am asking if the time I spend in Poland while having a valid temporary residence card do or do not count towards my 90 day limit in Shcengen.
3- When you leave you cannot get back to Poland only with the stamp. Either you will need the visa or the residence card.
As an American I am allowed to be in Shengen for 90 days per 180 days without a visa, and for Poland any 90 day period. So it would not be an issue right?