So, your mapping file in the form is set to false for repeating - and the XPath for the repeating group isn't present.
Here's what I'd expect your mapping to look like:
<my:Mappings>
<my:IsRepeating>true</my:IsRepeating>
<my:RepeatingGroup>my:myFields/my:SafetyChecks/my:Stats</my:RepeatingGroup>
<my:Mapping>
<my:FormField my:IsRichText="false">my:Condition</my:FormField>
<my:SharePointColumn>Condition_x0020_Type</my:SharePointColumn>
</my:Mapping>
<my:Mapping>
<my:FormField my:IsRichText="false">my:BehaviorType</my:FormField>
<my:SharePointColumn>Behavior_x0020_Type</my:SharePointColumn>
</my:Mapping>
</my:Mappings>
The attached pic shows what it actually looks like.