It will be helpful if you describe the parameter used and the workflow.
In the attached image, you can see that FEFLOW recharge applied as In/outflow on
top/bottom takes into consideration the area only.
I believe you are using other parameter, applying an expression to the
parameter, or other configuration, which could cause the unexpected values. In
case you have very specific questions about your model, the technical support
(mike.de@dhigroup.com) can take provide you detailed guidance.
Best regards
Carlos Rivera