Having trouble syncing contacts to Google

[Android Central Question]

It seems events that I add to my calendar on my phone(S7) automatically sync to Google Calendar. However, its not working the same with contacts. Sync is turned on for my Google account under the drop menu in Contacts, its also turned on under Cloud and accounts in Settings. After experimenting, I successfully moved my contacts manually to Google Contacts by selecting Move Contacts From Phone under the drop menu in Contacts. After deleting the contacts from Google Contacts, turns out they also got deleted from my phone. This makes me wonder if its a one way sync? But then again why does the calendar sync to google without issue?