Are there two Ashfurs

Yes there is.

Ashfur of ThunderClan. (Murdered by Hollyleaf) = in Long Shadows, but revealed in Sunrise.

Ashfur of ShadowClan. (Died of sickness in Rising Storm. Introduced in Into the Wild).

NOTE: Ashfur of ShadowClan was not evil or bad. Also he was introduced as an elder.