FYI, the CogAT is NOT supposed to be timed for grades K-2. For many kids it is the very first standardized test they have ever taken. It is also not intended to be used as a way to exclude kids from gifted programs, even though it routinely is. The creators themselves have said that.

Her scores should not be considered valid if she did not finish. I don't think they need to give her a different test necessarily. They should start with giving the CogAT properly.