Hi Farmerj,
Could you please send us the two documents (one where you added comments from Reader Mobile and is not opening fine on PC and the othere where you added comments from PC and is not opening fine on Reader Mobile) to DL-adobereader-android <adobereader-android@adobe.com> to help us investigate the issue at our end?
Please include the forum link as well in your email for reference.
Thanks,
-Reader Mobile Team