(as replied to you by email)
The BLU becoming the defending team is "by design":
Stage 1:
- BLU try to take over RedShip.
- When they do succeed, they stay in RedShip and become the defending team.
Stage 2:
- BLU are hacking into RedShip's computers to find incriminating information (back story stuff...) to they must protect the hacking devices.
- RED are coming back and are trying to prevent the hacking of RedShip by destroying the devices.
There are on-screen messages telling you this.
Remember that if you switch teams before the end of a round, you'll switch back to the same team you were before the switch...right?
Redo the whole sequence as BLU and read the messages on-screen... should make more sense and YES, the RED team do exist on RedShip!
Still, thanks for pointing out the unusual.
MQ