I am using the Tribulant Shopping Cart (http://tribulant.com) on a client site along with TML plugin. Tribulant adds customer shipping and billing information to customers profiles.
When the TML themed profile is turned off there is only one set of customer shipping information. But when TML themed profile is turned on then this information is duplicated, i.e., two sets of the same fields.
I have contacted Tribulant support and they believe it is your plugin that is doing this.
Client site has not gone live yet. Feel free to create an account and see for yourself: https://cakeitupcakestands.com/site/ Let me know how I can help work with you to resolve this issue.