Website.... If every day were like today... You'd weigh.. 5kg out from IOS app

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I just noticed with the new look website diary that it reports "If every day were like today...You'd weigh X" is approximately 5kg heavier than the IOS version reporting for the same day. I've been tracking my meals for around 3000 days and the IOS prediction has been accurate. Just wondered if anyone else has found this?