It's been some time since I have been on the floor but different market makers use different software.Remember also that if a market maker has

a large position in 5 year note options it is possible his "sheet" in the Eurodollar option ring

may relect this.The large market making firms update frequently and will mix apples with oranges.The point is the sheets the marketmakers

use as well as their software is typically useless for the average person.