Balance updates are often delayed inserting into the bureau dataset, and then there's sometimes a delay in the monitoring solution.
Tradeline deletions like collection removals aren't ever tracked unfortunately; though in TU's case you will occasionally get a score update without a reason and that does encompass prior changes like deletions of collections and other non-trigger events.
The monitoring solutions were originally written by the bureaus for the lenders: lenders don't care when old negative information goes away, only when new negatives get added... makes sense unfortunately even if it isn't ideal from our perspective as consumers.
