Unzip and delete .zip file

I want Hazel to automatically unzip .zip files, leaving the unarchived folder in place and deleting the .zip file. For some reason this not only deletes the .zip file but also deletes the folder which holds the unzipped files. I can try breaking it into two different steps, but I would also like to know why this does not work:

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The unarchive action already moves the archive to the trash. You should remove the Move action afterwards as that is moving the unpacked contents.

Thanks. That was non-obvious.

What if I want to preserve the .zip?

You should copy it somewhere else first. Note that actions in the same rule after a copy action apply to the copy so you may want to split it into two rules and use the "Continue" action on the first one.