Updates are prompted to you when you open Cydia, and a pop-up will appear if there are important updates (ones that involve Cydia or basic system things like substrates). I have the same version as you and there aren't any updates that are important that appear when I open Cydia, meaning even if you or I are slightly off of the highest number, unless it is a dire update, there isn't a need for that highest number. So stop worrying.