I want to direct several menu points to the same cms page. To make several paths to the same information.
For instance, if my menu structure is like

A1
---A1B1 <- Real page
---A1B2
A2
---A2B1 <- Shadow page
---A2B2
---A2B3
A3
---A3B1

I will put content into A1B1. I would like A2B1 to show the same information, but since I don't want to update double, I want A2B1 to be a shadow page, that only points to A1B1.

I have tried to do this by meta redirects and by javascripts in the html source of A2B1, it does work, but somehow the master template I base the page on, is changed instead of the actual page. It doesn't help either, to make my own master from one of the preinstalled ones. Somehow this problem the affects both my master and the preinstalled I based it on.

Any other ideas to solve my real page/shadow page problem?