Have tried it in the sim again and the thing is that there is (obviously) very little difference between the TOGA demand and CLB rating at altitude. On first glance it does indeed look as though the #2 (in your example at CLB notch) goes to TOGA and the thrust rating value on the upper ECAM changes as one would expect to TOGA.
In fact closer inspection of the EPR doughnuts (and finally EPR value) shows that #2 stays at CLB rating and that there is a (albeit) very slight difference between the two engines, #1 being at TOGA.
The way to absolutely confirm this of course is to do it at low level but have not had the chance to do this yet...will report further.