RB 10.5

I have selected a VST instrument (Applied Acoustics, Acoustic Struming)to use on a MIDI track. I want it to play a specific patch from its library.
I also want to use this same instrument on another MIDI track in the same composition but using a different patch.

The first track uses patch 3 on the first use of the VST plugin.
On the second track I want to use patch 5 on the second use of the plugin.

Even though there are 2 occurances of the same plugin on 2 seperat tracks if I change the patch number on one of them it changes the patch to that same number on the other one.

Does this mean I can only use 1 occurance of 1 plugin per composition?

Thanks