If you want to copy an element that was originally outside the container to the first position in a column, this element ends up in the last position in this column.
If the element was copied from the same container element, it can be pasted to the first position.
Tested in 2 environments with different setups:
- TYPO3 v12.4.27 and EXT:container 3.1.6
- TYPO3 v13.4.5 and EXT:container 3.1.3