Antminers have 3 default pools defined, and the behavior of Antminers is to revert back to these pools when a hard reboot is made. When changing the current pool where the Antminer is mining, the default pools are not changed.

Awesome Miner can configure the default pools as well. Select one or many Antminers and use the toolbar Tools -> ASIC Tools -> Default Pools (via SSH), to define the 3 default pools.