The idea of the cluster is to tank them up so they may not take a full feeding anyway. On that routine you posted you have a feed at 6.30, so you can either offer a full feed and see if she will take a bit more at 8 (which she may do after a bath) or offer a smaller feed at 6.30 and a full feed at 8pm.
I would go for a full feed at 6.30 and just offer another feed and see how much she takes at 8 in case she gets too tired to feed properly.
I also meant to say congrats on the new baby in my last post - I was pretty sure I remembered helping you before! I'm glad to have helped before and hope I can again!

Laura