Well, first of all, the 10th Anniversary Project, Selector loth Wixoss, shows a lot of things. And most of my information comes from the Web Novels and Manga.

• The Drama CD where Kiyoi and Akira become friends may be canon as in loth, Akira became a CEO of a beauty product company with Kiyoi as her helper. Meaning that she is still her friend in this Selector universe instead of enemies in the Lostorage universe.

• So I would not say their relationship is “Retconned” and see the Lostorage series as an alternate universe due to this fact?

• Another thing is that Ruuko, Yuzuki, and Hitoe go to different high schools instead of going the same high school like in Lostorage conflated Wixoss.

And I have seen and read it all via this link:

https://www.takaratomy.co.jp/products/wixoss/special/selector_loth_wixoss/

Just get Google Translate, and you will understand.