So having two of the same field with separate render conditions is causing both to appear? If so, my suspicion is correct. You’ve found a bug.
What version are you using? Can you test in a sandbox with newer versions?
Does the field need to be editable? If not, you can use a template field to conditionally render the “Y” with custom css using a formula field in the template.
You’d create a UI-Only Boolean called AADHARIsYes. Using this you could set the class of the div in the template field. Something like this.
{{AADHAR__c}}
