Most likely this is just a temporary glitch caused by an app that you uninstalled recently or the system settling down after the update. Full charge and restart and it should disappear, nothing to worry about for now. Tell us how it goes.
10233 looks like it was the process ID for the app that you deleted. Battery Monitor is showing the process ID number instead of the name. Probably happened due to deleting the app. You have not done anything wrong, I think its just the way that the OS reports historical battery usage in situations like this.