You can check if a budget has changed since it was created.
Select Position Budget Manager > Reports > Budget Net Changes.
Select the position plan to monitor.
The list of budgets for the position plan appears with a start and end value for each budget, with a tab for each of the counts included in the position plan (FTE, Headcount, Salary).
Click the appropriate tab to view the counts.
Click a budget line to view the details of the changes. The most recent changes are displayed at the top.