Does anyone know why at Champions League games,Dortmund stadium has only 65000 fans while in Bundesliga over 80000?

Most likely it's due to the price of the tickets, especially when it's the semi-final.

They're not allowed to sell tickets where the crowd stand instead of sit

How do the crowd standing get inside the stadium in the first place?

I think FR types in random rough capacity numbers.

@man_utd
No it is official that were sold 65829 tickets.
@Heisinburg
No matter the price it is for sure that the stadium will be full.
The tickets were sold 2 hours after their release..
@Volkinator 
Probably. Thanks

SAFE standing = more space = 80,000 maximum capacity
European matches = No safe safe standing allowed = space converted to folding chairs = only 65k maximum capacity
Either way = spaces allocated are almost always sold out

Price of tickets? But that doesn't normally stop Dortmund fans :P

@Footaholic
Thanks Mate..
@Ramaboy,yes thats true..