Upcoming Maintenance
On 10/29 from 11am EST - 3PM EST DomiNations will be down for a brief maintenance period. This maintenance is to address backend compatibility updates only. There are no bug fixes or feature updates included.
And the generals you want to send are active at the castle, there should be a button to deactivate them rather than having to exit out of the dock, deactivate, and then return to the dock to send them.