Is there definitely more to go on sale? I think the last batch for the Spain match were unsold away tickets but Georgia won't initially be reserved such a large allocation.
Had problems last year when the Polish border police didn't stamp my passport. Tried flying out of Germany a few days later and took about 15 minutes to get through and needed evidence of my flight to Poland. Make sure they stamp your passport.
Similar with the buildings in Vietnam. Every 4th floor in the modern apartment blocks are "KT" which is usually the gyms and swimming pools. Not sure about the bigger numbers. They always have floor 13 as 12A too.