I would verify that all of your phone contacts are in the Google cloud, by accessing your Gmail account on a PC or either the web browser on your tablet and using the drop down key beside "Gmail" to select contacts. If your cloud based Gmail Contacts do not total 160 then you will want to check to see if your Gmail account on your phone is set to sync and you can also force the sync. If the contacts in the Google Cloud match those on your phone then check the sync setting on your tablet. Note theses are only general suggestions, but none the less, will establish where the sync failure is occurring.