The opponent´s pendulums always show YOUR mark.

[teffy]

The opponents pendulums card always shows the mark of the player, although the small picture shows the right swing phase.

Ok, this here is a stolen one, but´s the same thing with pendulums, which are not stolen.

[kledar]

yea I saw this today too. Only I can't tell if it was giving him the correct quantum or not, its hard to tell with a rainbow deck

[Boingo]

I don't think this is much of a bug.  If you steal or mindgate the pendulum, that is what you'll get.  And it's not like you can't tell what the opponent's mark is anyway.