When you use the "Auto-move to storage" button when looking at different cities storage (after doing magnus and unlocking global storage link), it detects that it can stack it to that storage, but it puts it in the storage your character is at.

Looks like this got fixed, YAY!

"Fixed the issue of the Auto-Move to Storage feature not functioning when moving items to storage in another region."
https://www.naeu.playblackdesert.com/en-US/News/Detail?groupContentNo=4167&countryType=en-US#h_97234513612491666718082368

Thanks!