App Store へsubmitした時刻と、アプリのtimestampが異なる？

アップル社から、以下のメールが届きました。。

「Dear developer,

We have discovered one or more issues with your recent delivery for “大家さんのネット集客術”. Your delivery was successful, but you may wish to correct the following issues in your next delivery:

Post-dated Code Signature – Code signature identified by ‘●●●●’ in bundle ’●●●●’ has a timestamp of ‘2014-06-04T22:59:31.000-07:00’, but it was submitted to the App Store at ‘2014-06-04T07:02:03.936-07:00’. This might indicate that your system clock is not set to the correct timezone. You can also synchronize your system clock with a time server in System Preferences ‘Date & Time’.

If you would like to update your binary for this app, you can reject this binary from the Binary Details page in iTunes Connect. Note that rejecting your binary will remove your app from the review queue and the review process will start over from the beginning when you resubmit your binary.

Regards,

The App Store team」

なぜ、App　Storeへのsubmitした時刻が、アプリのtimestampと異なるのか？？

全くわかりません。。

どう対処すればいいのかな・・？？