WMG: Stargate: Infinity

Stargate Infinity occurs in an Alternate Universe in relation to the SG-1/Atlantis/Universe universe.
Like the original movie. In "There But for the Grace of God", the alternate Carter says that alternate universes differ in their degrees of likeness to each other. It's not inconceivable that there's an alternate universe in which the Stargates have eight chevrons rather than nine, and the Ancients are Dragon-people.

Stargate Infinity was created by Martin Lloyd.
It was produced as a Lighter and Softer spinoff of Wormhole X-Treme, and it was deliberately inaccurate to help maintain The Masquerade.