My two pennies...
Your "not" drinking somehow gives her anxiety..whether that be the change in your relationship or if she is a wee bit "codependent" she may feel that she is somehow responsible for your sobriety hence her overstatement of your sober status.
I do believe her intention was definitely to be supportive...but I know, for me, that would make me NUTS...
My sobriety is my business...both in my management of it and who I disclose it to.