Hello Andri,
each 802.1Q tunnel needs to use a distinct customer vlan-id in order to build 4 point-to-point transport services.
the second 6500 on the right cannot be at the same time a L2 service provider device and a L2 CE device.
It can terminates the 4 802.1Q tunneling links to another device or it can act as a L2 CE with two bundles configured.
L2 protocol tunneling requires explicit configuration to carry PAGP frames over the tunnel.
Hope to help
Giuseppe