It should be "We go to church"
Agree. If you go to the the "SERVICIU" it should be .. to church.
What is the difference between azi and astazi?
No difference in meaning. They are interchangeable.
I am Romanian and there is no difference between those. I have spotted many errors along the courses so you don't really have to mind them. "azi" and "astazi have the same meaning so feel free to use them in any way :)