Copy edit multiple Account usernames bug entry.

Formatting updates.
Remove changelog entry from missed 4.68.0 release

Author: leslitagordita

src/content/changelog/4-69-0-2020-07-13.md

@@ -24,10 +24,11 @@ changelog:
 
   - Update Config ([PUT /nodebalancers/{nodeBalancerId}/configs/{configId}](https://developers.linode.com/api/v4/nodebalancers-node-balancer-id-configs-config-id/#put))
 
-- URLS added to the Create Managed Service ([POST/managed/services](https://developers.linode.com/api/v4/managed-services/#post)) and Update Managed Service ([PUT /managed/services/{serviceId}](https://developers.linode.com/api/v4/managed-services-service-id/#put)) may now include additional special characters.
-
 - The `tag` field for the [Domain Record](/api/v4/domains-domain-id-records/#post) collection is now filterable. See [Filtering and Sorting](/api/v4/#filtering-and-sorting) to learn how to search API v4 collections.
 
 ### Fixed
 
-- A bug was fixed that could result in a race condition to the Create User ([POST /account/users](https://developers.linode.com/api/v4/account-users/#post)) endpoint if two identical users were created at the same time.- A bug was fixed that prevented users from adding or editing endpoints in the Tags collection on resources that they had edit permissions for.
+- A bug was fixed that allowed multiple Account Users to be created with the same `username`. This bug affected the Create User ([POST /account/users](https://developers.linode.com/api/v4/account-users/#post)) and Update User ([PUT /account/users/{username}](/api/v4/account-users-username/#put)) endpoints.
+
+- A bug was fixed that prevented users from adding or editing endpoints in the Tags collection on resources that they had edit permissions for.
+