Hello,
What version and license of phpdocx are you using? Please send to contact[at]phpdocx.com the username or email of the user that purchased the license you are using.
You need to use DOCXPath (https://www.phpdocx.com/documentation/introduction/docxpath) for both tasks.
I'm working with blocks and need to clone a block and append it to the end of the document, not just where it is currently located
You need to use cloneBlock to clone the block and then moveWordContent to move the cloned block to the end of the document.
is it possible to use the deleteBlock method to delete the Nth clone of a block
The deleteBlock method doesn't include a method to delete specific positions of a block, but you can use removeWordContent to accomplish this task.
Regards.