I'm not going to point out where exactly the site doesn't match the info I posses. Instead here is a couple of websites I found about air war over Poland in september 1939. They are all based on figures and facts given by Jerzy B. Cynk or Jerzy Pawlak - 2 most reliable historians investigating Polish campaign.
Sry for my bad English

http://www.s-studio.net/polavhist/sept39.html
http://www.s-studio.net/polavhist/emblems.html
http://www.elknet.pl/acestory/1sept/1sept.htm
http://www.elknet.pl/acestory/gnys/gnys.htm
http://www.elknet.pl/acestory/pol39/pol39.htm
http://www.elknet.pl/acestory/dzwon/dzwon.htm
Regards,
Aleks