I don'tnow that they are nonsense so much as they are just not FICO.   In my own case my CK TransUnion score has been steady for months but my TU FICO score recently took a serius dip when I hit certain milestones in my debt repayment program .  CK is a place to monitor cahnages in your report.  the scores are accurate I suppose but you should bever assume any correlation with FICO>