Downgrading "Unit Storage" with unity leaves more items inside than capacity

You can see in the screenshot inside the unit storage I, there are 484 of 200 242% items inside.

I downgraded from unit storage II by using the "Unity tool bottom left and drag and drop over multiple unit storages, downgrading 6 storages together. The items did not get removed nor did i had to pay the unity required to remove the items.

This has been the case for a while. As items are used from the storage, the number will drop until it is below the regular max number, then the inputs will start taking in new materials.