Struggling with subfolders

I have put the subfolder issue off as ling as I can but now need to accomplish a task that requires me to figure them out. I have read the subfolder sticky and other entries and still cannot get my rule to work correctly.
Maybe it is correctly figuring the subfolder depth to start with...
This is the path to the folder in question;
User>Folder 1>Folder 2>Folder 3>Folder 4>Folder 5>Customer>Completed Archive
Folder 5 contains 10 subfolders each containing Customer folders and a Completed Archive folder that the Customer folders are moved to upon completion.
So, I have a rule that acts on each Customer Folder in Folder 5 that is completed by labeling the folder Green and moving it into the Archive folder. That rule works great.
Each Customer folder contains a PDF that I want to auto-open in Preview. I set up an Open PDF Rule that states:
If All conditions are met for any of its sub-files or folders:
Kind is PDF
Subfolder depth is LESS than 3
then
Open with Preview.
It works but it also opens the PDFs in the Archive folder. That's a lot of PDFs.
I have tried varying the subfolder depth and that either makes the rule act on nothing or everything. Have also changed the initial line about what it acts on (any of its sub-files or folders:) with no success.
Suggestions anyone?
Maybe it is correctly figuring the subfolder depth to start with...
This is the path to the folder in question;
User>Folder 1>Folder 2>Folder 3>Folder 4>Folder 5>Customer>Completed Archive
Folder 5 contains 10 subfolders each containing Customer folders and a Completed Archive folder that the Customer folders are moved to upon completion.
So, I have a rule that acts on each Customer Folder in Folder 5 that is completed by labeling the folder Green and moving it into the Archive folder. That rule works great.
Each Customer folder contains a PDF that I want to auto-open in Preview. I set up an Open PDF Rule that states:
If All conditions are met for any of its sub-files or folders:
Kind is PDF
Subfolder depth is LESS than 3
then
Open with Preview.
It works but it also opens the PDFs in the Archive folder. That's a lot of PDFs.
I have tried varying the subfolder depth and that either makes the rule act on nothing or everything. Have also changed the initial line about what it acts on (any of its sub-files or folders:) with no success.
Suggestions anyone?