Make sure you do a full reset to factory defaults on each node and then don't touch them again. Except by 'pointing' to them from the main router's GUI, after you have fully reset it too.
Make sure to remove all USB drives (safely, if needed, via the GUI), check the box to format the JFFS partition on the next boot', hit 'Apply' at the bottom of the page and then reboot the router three times in the next 10 to 15 minutes, waiting 5 to 10 minutes between each reboot.
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