Are you sure you have not configured AS1?
Here is the output without any EIGRP config
Switch-D(config)#do sh ip eigr top
Switch-D(config)#
and here is the output after I configure EIGRP 1
Switch-D(config)#router eigrp 1
Switch-D(config-router)#do sh ip eigr top
EIGRP-IPv4 Topology Table for AS(1)/ID(0.0.0.0)
Switch-D(config-router)#
and here is the output after I change EIGRP 1 to 2
Switch-D(config-router)#no router eigrp 1
Switch-D(config)#router eigrp 2
Switch-D(config-router)#do sh ip eigr top
EIGRP-IPv4 Topology Table for AS(2)/ID(0.0.0.0)
Switch-D(config-router)#