I suspect you'll need to post the FCW file here to get some definitive answer to why these symbols are showing as green and with a green edge, as there are too many variables to try to guess at something useful without that information.

The wall and tower symbols in Darklands City go on to one or other of the SYMBOLS Sheets. There is a dedicated SYMBOLS 2 (walls) Sheet, and another SYMBOLS 3 (towers) Sheet, although you would need to have selected either of those Sheets to have the walls (or towers) go on to one of them as you place the symbols. Otherwise, if you have no other SYMBOLS Sheet selected, they will default onto the normal SYMBOLS sheet only.

I ran into a few issues with CA3 some time ago, where I found a few missing items, or varicolor features that weren't varicolor, or symbols that weren't correctly set to match the standard CA3 snap grid. I reported those to ProFantasy, and what I found were all fixed quite quickly.

It sounds as if you may have spotted at least one other symbol - the missing sleeves - where there could be an issue, and if so, I'd recommend reporting that to PF directly (indicating exactly which symbol is missing).

The problem with CA3 is there's a huge number of symbols many of which look very similar to one another if you're only checking the artwork, and not testing every one in a full CC3+ drawing, so these few have probably slipped through the cracks somewhere, I suspect.

We've been asking for more artwork options for CA3 for years. However, I don't think it's an especially popular add-on for the main program, and is somewhat removed from its core mapping facilities, so it seems unlikely anything much new is liable to appear any time soon for it. The hand-drawn look is more modern-looking than the original vector artwork (which is still available in CA3), although the vector artwork was much easier to draw your own additions in, if you needed them, than the newer raster versions.

Folks - Do please note that this week's live video is scheduled to begin 30 minutes later than normal, according to the timer note on YouTube. That's at 16:30 UTC, NOT 16:00 UTC!

Treating the Forgotten Realms setting as a sandbox onto which you can project your own preferences and ideas is an excellent one, albeit I say this as having used exactly this same Mirabar region for starting my own 5e explorations in soon after that edition first came out! Didn't get as far as I'd have liked with it, but I might return to it one day - and this image took me right back to my first mapping in the area as well.

I might make the hex grid a little more obvious is all, if it'll be important to judge distances more exactly, and quickly, during the game.

The Arena symbol only has one orientation, but the Amphitheatres tab fine for me.