I'm still worried a little bit and I want to put my mind at ease.
In that case, go visit the Straż Granicnza and get them to confirm it. You can also call them, but it might be easier just to visit them as you're in Warsaw anyway.
You can go here - strazgraniczna.pl/pl/kontakt/1946,Komenda-Glowna-Strazy-Granicznej.html - but I think it would be better to go here - nadwislanski.strazgraniczna.pl/wis/kontakt/11235,Kontakt.html - as they have territorial responsibility for operational matters in Warsaw.