EX3300 LAG (LACP) strange behavior

Hello guys.

I have a 2 x XE port LACP going from an EX300 virtual chassis (lets call it EX-VC) to en EX3300 standalone (lets call it EX).

I have configured the EX-VC as such:

# show interfaces xe-0/1/1
ether-options {
    802.3ad ae0;
}
# show interfaces xe-1/1/1
ether-options {
    802.3ad ae0;
}
show interfaces ae0
aggregated-ether-options {
    lacp {
        active;
    }
}

I have configured the EX as such:

# show interfaces xe-0/1/0
ether-options {
    802.3ad ae0;
}
# show interfaces xe-0/1/1
ether-options {
    802.3ad ae0;
}
# show interfaces ae0
aggregated-ether-options {
    lacp {
        active;
    }
}
unit 0 {
    family ethernet-switching;
}

Now, let's look at the aggregated interfaces.
Here is the EX-VC, and we can see something odd here already:

# run show lacp interfaces ae0
Aggregated interface: ae0
    LACP state:       Role   Exp   Def  Dist  Col  Syn  Aggr  Timeout  Activity
      xe-1/1/1       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-1/1/1     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
    LACP protocol:        Receive State  Transmit State          Mux State
      xe-1/1/1                  Current   Fast periodic Collecting distributing

So let's look at the EX side:

# run show lacp interfaces ae0
Aggregated interface: ae0
    LACP state:       Role   Exp   Def  Dist  Col  Syn  Aggr  Timeout  Activity
      xe-0/1/1       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-0/1/1     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-0/1/0       Actor    No   Yes    No   No   No   Yes     Fast    Active
      xe-0/1/0     Partner    No   Yes    No   No   No   Yes     Fast   Passive
    LACP protocol:        Receive State  Transmit State          Mux State
      xe-0/1/1                  Current   Fast periodic Collecting distributing
      xe-0/1/0                Defaulted   Fast periodic           Detached

The EX side looks fine!

But what's going on with the LACP on the EX-VC side? Let's look at the interfaces, and try to find out why it's only showing xe-1/1/1, when we have configured xe-0/1/1 to be a part of the LACP as well.

 run show interfaces xe-0/1/1
error: device xe-0/1/1 not found

Hmmm.. What interfaces can I select?

Possible completions:<interface-name>     Name of physical or logical interface
  xe-0/1/0
  xe-0/1/0.0
  xe-0/1/3
  xe-1/1/0
  xe-1/1/0.0
  xe-1/1/1
  xe-1/1/1.0

There is no xe-0/1/1, how ever theres an xe-0/1/3, but what the heck is that? It's not configured on the EX-VC, it's not a part ae0!
I dont know how to move on from here.