Yeah, the origin of the symbol (i.e. the point it will snap to) will normally be in the center or on the edge of the whole BITMAP (depending on how it was imported).

But since the bitmap is irregular and will probably have various transparent bits around the edges, this will not automatically align with something the user sees as the center of the symbol (e.g. in this example, the center of the statue's circular plinth or the center of the figure).

I've highlighted the option here.

I'm looking into this now, sorry that I missed this earlier.

Yes, this is expected behaviour. The original symbol splits into 3 when it is placed and no actual instance of itself is placed in the map. As the Purge functions removes all symbols in the drawing that have no actual placed instance, it removes the original, and only the original.

Thank you for reporting it, I'm fixing the setup.