Omni Agents are exceeding their maximum Capacity as seen via Omni Supervisor

There are two scenarios in which an Agent can go over their assigned Capacity (via their Presence Configuration) as seen in Omni Supervisor.

Scenario 1: Direct Chat Transfer Ignores Capacity Limits
Chats can be directly transferred to agents by other agents. Chat Transfer ignores any capacity restrictions, allowing the Agent to consume more capacity than they may have available. 

Scenario 2: Chat License Not Enabled on Agent User Record
When you see Agents going over capacity by hundreds, this can occur because these Agents are available for chat (a Chat Service Channel) but don't have the Chat User license enabled for their User record. Omni channel is trying to route chats repeatedly to the user, each time consuming capacity, but each attempt to route fails.

To resolve this, Ensure that all Agents that can go available for Chat Service Channels have the Chat License enabled on their User record.