yeah, but I'd think that even so, the extra / ghost like could point out that the account was deleted... I know we keep some posts for accounts that got deleted...Odd. I also see 6 likes but only 5 users. It could have counted a 'like' from an account that no longer exists though.
The post right after it has 4 'likes' and 2 'thanks' but only lists one user for 'thanks'. I suspect these 'ghost' likes/thanks are from deleted accounts.