Galaxy Ace - Contact NAME but not NUMBER has been synced to gmail

[Hanham]

I recently had to restore factory settings so all my contacts were deleted. I had sync to gmail set up so I logged into my gmail account and it appears all my phone contacts had been synced. However, there are several contacts which have been synced to gmail but without the telephone number! So I now have several contacts missing. I'm not sure why the contact name would have been synced but not the number. Any way I get get the contact numbers!? Thanks!