If the credit is $500 it is probably right. There is a $500 Credit for Other Dependents (aka “Family Tax Credit”). For more information on this credit, click on: What is the $500 Credit for Other Dependents (“Family Tax Credit”)?
The Child Tax Credit is $3,600 per qualifying child under 6, and $3,000 per qualifying child age 6 - 17. For more information on the Child Tax Credit click on: What is the Child Tax Credit?