@mafketis
Check out Schengen regulations online, what the Polish or US embassies say about an agreement from 1991 is meaningless. In terms of entry Schengen guidelines matter.
According to rooshvforum/thread-31412.html
"the diplomatic note of April 4th 1991 overrides Schengen rules" and "There's no way to "restart" a Schengen visa, except by leaving the entire region for 90 days, then coming back. If you leave for one day or one week, your previous stay is still counted. (This is for countries without bilateral agreements with the USA, of course) FYI, Denmark is similar to Poland in allowing stays beyond 90 days in a 180-day period:"
This source seems to support this statement:
ec.europa.eu/home-affairs/sites/homeaffairs/files/what-we-do/policies/borders-and-visas/border-crossing/docs/short_stay_schengen_calculator_user_manual_en.pdf
"The calculator cannot take into account more favourable rules applicable to short-stays of
third-country nationals under bilateral visa waiver agreements between certain Schengen
States and certain third countries as provided by Article 20(2) of the Convention
Implementing the Schengen Agreement (CISA)"