The User Dashboard does reflect the agents who are currently active for chats. If an agent is listed on the Inactive tab, then they are not marked as active for chats or tickets. If an agent is listed on the Active tab, then they are marked as active for tickets or chats. You can determine if an Active Agent is available for chat by looking at the Chat Groups column. In the below screenshot, you can see that Administrator is available for chats in all three assigned groups, Agent is not available in either of their two assigned groups, and Manager is available in two of three assigned groups.