It's actually Six Sigma Certification. I'm not associated with Motorola, but "Six Sigma at many organizations simply means a measure of quality that strives for near perfection. Six Sigma is a disciplined, data-driven approach and methodology for eliminating defects (driving toward six standard deviations between the mean and the nearest specification limit) in any process – from manufacturing to transactional and from product to service." (I was an IT Lead Project Manager and taught Quality Standards).
It is also well known that Quality is directly proportionate to Cost. FFRs are an EXCELLENT value, I'm not saying they couldn't be better, but at a cost.

I've seen competing kits that were much worse.
These are known and reported issues and not worth sweating over. Yes it would be nice if FFR corrected them, but meanwhile Adjust and don't let it bother you. If you want perfection, buy a Kirkham.