Not all data is being shown in my published google spreadsheet

I just published data to Google spreadsheets but it is showing me less data than what I expect to be having. Am using odk aggregate deployed on google app engine. I see data until May yet I have submitted data in June.

What version of Aggregate are you using?

It sounds like this worked before, so what changed between when it worked and when it didn't work?

Is there anything in the Aggregate user interface or logs that offer any clues as to what is going wrong?

The version of Aggregate am using is v1.4.13. Apart from having more data nothing else changed. Am not seeing any clues on from the logs.