I seemed to already have an account on there, so gave him an answer, but my answers in this regard are unofficial, I can't give an official license interpretation on behalf of ProFantasy, for that he needs to contact them directly.

That can be an advantage, but remember it is valid for the entire session, so it will affect future maps opened in the same CC3+ session. Not likely to negatively affect most maps though, but worth being aware of if something weird happens.

The offset is because in Traveller, the base is supposed to be in the same Hex as the planet, in the 10 o'clock position. With the offset in place, you just click the planet down in the middle of the hex, then followed by the base in the same position, and thanks to the offset, it will be perfectly placed every time.

The reason you get it in a different hex is that you have the symbols scaled too large. I realize that this is how you probably want them, but in Traveller, the planets only occupy a small part of the hex, with room for symbols and names surrounding it in the same hex.

If you are not making a traveller map, I recommend using a different symbol catalog. You'll find the same symbol sin other Cosmographer catalogs without the offset, with the exception of those very simple Traveller-spesific symbols (Such as the bases)

Which symbols are you trying to place? Almost all of the Traveller symbols are designed to be offset to the placement point (center of the hex) on purpose, because they are supposed to be placed according to the official guidelines. Only the main world itself will be centered, the other symbols are intended to "surround" it at fixed offset/position depending on symbol type.

As for scale, the Traveller symbols are scaled to fit a grid size of 1. If you make your hex grid larger than that, you also need to change the symbol scale accordingly.

Kangaroos in the Snow?

For you southerners, I do remind you that I wrote winter or holiday themed, so a typical Aussie Christmas scene is fine, it don't need to be wintery if it looks Christmassy.