Not sure if this is an issue with the package, or with Atom itself...
If you start typing a keyword such as cfquery, the complete options are simply "cfquery (update sql)" and "cfqueryparam". However, there are multiple different completion templates which all have the prefix "cfquery"; it looks like only the last one is being displayed in the list. The same is observed for cfregistry - only "cfregistry (set)" is displayed as an option.