Hey, I'm kind of having the same issue but with 14.1 software. EX4300 switch, ELS 14.1X53
When I'm applying the push/pop statements it gives me this...
interface with vlan-id-list and input-vlan-map swap/pop is not supported
Plus getting some of the errors you did as well.
If you are still on here, can I see your complete config layout on this Q-in-Q?