There are a number of ticket events that appear in the agent interface as though they are all being done by one admin (creating or assigning tickets, or making changes to ticket properties). But this admin has no recollection of having done these actions.
- No plan restrictions.
- Account utilizes some kind of API or third-party integration with tickets.
Take a look at the types of tickets these events are appearing on. If they're only appearing on ones created through a third-party application that uses the API, then it is expected for the admin that authorized or set up the integration to have their name appear on events.
For example, if your account is using the Zendesk Talk Partner Edition with RingCentral or Five9s, then any tickets created or updated through that integration would have the name of the admin who set it up listed under any events.