Documentation updates for PR #2295 (#307)

docs/experimental/monthly-cleanup.md

@@ -30,9 +30,10 @@ The feature works sequentially in the following manner after pressing the **End
 ![](/img/monthly-cleanup/cleanup-01.png)
 
 1.  Any `#cleanup source` entries will be found and all extra money in those categories will be returned to **To Budget**.
-2.  Any **Overspent** categories will be found and will attempt to cover the overspending from **To Budget**.
-    - A category that has the **Rollover Overspending** option enabled will be ignored.
-3.  Any `#cleanup sink` entries will be found and redistribute the remaining **To Budget** amounts based on the weight given.
+    - A source category that has a negative balance will be ignored.
+2.  **Overspent** categories that do NOT use **Rollover Overspending** will be found and will attempt to cover the overspending from **To Budget**.
+3.  **Overspent** categories that DO use **Rollover Overspending** will be found and will attempt to cover the overspending from **To Budget**.
+4.  Any `#cleanup sink` entries will be found and redistribute the remaining **To Budget** amounts based on the weight given.
 
 ## Calculating the weights of 'sink' categories