That still does not account for the 2 extra flights inbound from Katowice during the month of March.
GDN-SNN-GDN is operated by one aircraft In at 2210 / Out at 2245
The Warsaw service does originate in Katowice and routes KTW-SNN-WAW but on 3 days of the week Only - As the Inbound KTW comes in 5 days - there are 2 unknown outbounds.