Hello Arjan? Magic Items?

[Lord Eldred]

I am not sure why there are two places for magic items and if some of my posts are in the right place. Could you explain why some magic items written in the Writers Guild go under College of Sorcery and others go under 3eBirthright? It is also importent for when I write the intros for them.

[Lord Eldred]

For example, I think the Coin of Haelyn and the Birthright Artifurnace as well as the Cerilian Naval Manual all can be played in 2e or 3e. Shouldn't they then go under College of Sorcery magic items?