We have a client who is seeing a discrepancy between the number of matched contacts from an audience uploaded via our Social Audiences application (uses Advertiser Apis) and an audience created directly using Twitter Audience Manager. We used the same data with our internal account, creating an audience using our app and then in Audience Manager, and the number of matched contacts matched between the two audiences (although significantly less matches than the same data uploaded by the client). We are located in the US, our application is not internationalized/localized, and the client is in Japan. So, we wanted to find out if there could be a chance that the data is being processed differently (international characters or whatever) based on the locale from which it was uploaded?
Any assistance or information you can offer will be greatly appreciated.