In CCS, the longevity step shows as years completed with the pay rate being for the next year. As the example above, 4 years of completed longevity so you are in year 5 for pay.
And FYI, on the CAL side the first day of the December bid period was December 1st as December goes from 12/1-12/31 this year.
I verified my pay rates on my pay register in CCS yesterday. It took a few steps to get the system programmed it appears. First, my per diem was corrected. Then a couple hours later my large aircraft pay was corrected and then a few hours later my small aircraft pay was corrected. Verified all the block times and pay rates on the subsequent screens and all are correct going back to December 1st. Plus the new blended rate shows as well.