adpatch - SQL files repeated on re-apply

So we have this easy reproducable case:

We create custom eBS patches (with the OEM AMP/AMS module), and these patches can be applied onto our 12.1.3 environment.

On detailed checking, we found that:

When we re-run the same patch on a given environment, he is re-running the SQL files of that patch, even though the copy-feature of that same adpatch states earlier that: the file has the same version, and no copy is needed.

But, if for that reason he doesn't copy the file, why does he still re-run the file against the database ?

There is no technical problem with it, other than: