I'm not asking the obvious question, I promise.

I'm trying to put together some PCG files that I can use to overlay all the banks to contain the factory stuff, plus a subset of 3rd party stuff that I happen to want at the moment.
So, for example, I've created one that has the Epic Composer Series (FF and GG), and the Grand Epic Choir (EE).
That's all working fine. But what I can't understand is that when I go into bank USR-G and USR-EE , there's a "samples not loaded" message - and it's referring to samples that have nothing to do with what's loaded anywhere on the Kronos at the moment. (In fact, USR-G is empty.)
I've used PCG Tools to scan through all the libraries, and I can't figure out why the Kronos thinks it needs to load these samples. No combi's are referencing those libraries, and there's no old Wave Sequences lying around.
Any idea why this is happening? I guess it's not hurting anything, but it's bothering me.
And yes - the samples it thinks it wants to load are for libraries that used to reside in the libraries that are currently generating the message.