DWP and Tax Credits

Hi I have a query which im hoping someone may be able to advise me on - I have been moved from DLA to PIP. After the assessment i finally got my letter dated 11th July on which i have been moved down from Higher rate mobiility to standard and no allowance for daily living. I have asked for a mandatory reconsideration which i posted off yesterday. However I needed to speak to the Tax Credits so I informed them that my dla had been dropped. To my surprise the lady i spoke to said that they had received information on 14th July that i was now in receipt of lower rate care component and Higher rate mobility - completely different to what i have been sent! Im not exactly sure what to do now - i called the tax credits office back and double checked and yes that is definitely what they have received. Do I ring dwp or should i just assume that the tax credits have misread it? Any advice gratefully received as im a bit confused and wouldnt have bothered with a mandatory reconsideration if I had received what TC say im getting!

Thanks Gordon but the TC said it wouldnt make any difference to the amount I receive - if I were to start employment then it would. I was thinking of maybe writing to the Tax Credits and asking for a copy of the award??