This is my updated post from (7/2/18). I went all the way to the ceremony date because I noticed most people stop their post with the ...

My timeline in Houston: April 12, 2017 We received your case April 18, 2017 I got a receipt of my application by mail April 18, 2017...

Congrats to you too!

I don't know. I heard the ceremonies are once a month on Wednesdays, but don't really know.

You are correct. In June 28, 2018, “Interview Was Scheduled”  I guess I was sleepy writing when I blogged.

Also read the replies to the post "HTX" it is two blogs below yours. It also has another example of a Ceremony after interview.

Read my post which is on top of yours. I'm "estrella" it tells you when I received the letter and interview date. It may give you ...

I think your Interview Date must be after your Online Status Changed Maybe 7/23/18?