Well some observations or a few things noticed on viewing the scenery.cfg (which includes all the add-ons- all minors and none of which should have any impact your scenery display.
RTMM and tongass activated by add-on. All Orbx is activated by scenery.cfg (except terraflora is done by an add-on. The two Env entries on top are also activated by add-on.
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You know what you are doing BT! (A Compliment! Nice job).
here is a few quickies?
RTMM Global Scenery entry layer number for your system, to be perfectly correct should, be reduced by -17 or be configured to layer 17 layers lower in your order than present for correct placement- If you used the add-on.xml as is, then RTMM Global Scenery layer is specified as <Layer>131</Layer>. For your setup
change the number in the add-on xml (open with notepad) for then 2nd entry down:
<Name>RTMM Global Scenery</Name>
<Layer>131</Layer>
change it to read:
<Name>RTMM Global Scenery</Name>
<Layer>114</Layer>
Then when you start your sim, of will appear at the entry "Global, Generic & Vehicle Libraries".
Now also notice with your vector entries that EXX is below Africa, not that it would make a difference but Africa should be above ALL the vector entries. So move Africa UP 4 slots and it will be with the rest of the continents and All vectors entries will be below ALL the named continents.
World Elevation Tongass Fjords could be lowered by 2 layers, and RTMM World AI Trrafic could be lowered by 1 layer.. but again should not change the layered display whatsoever..
All to say a couple of things come to mind.. autogen veg level and the vector settings and orbx verify.
Might want use verify on your Orbx scenery. expecially the OpenLC products (NAAmerica) and global if you have it as these place blg files right into the default sim scenery/texture folders. And try a verify on Stewart (Just in case).
It is a minor for sure but you can also try reducing your autogen veg setting down by one setting and try CZST again. If the same extra trees, keep that autogen veg setting the same but turn off vector and try it again. If that CZST is that important then you can always to take out the CZST CIRP Operations base of the add-on and try it without. (I was under the impression that CZST was fine with either payware or default PJF).
Now Brad did that CIRP Stewart piece, will forward a link to this thread for his perusal.
Hope something in this helps BT.
Norm