This 
How could we know the egg was wrong? All we knew is that Rozaliz was appearing in the egg pool - after posting my initial 9 packs.
Then @GMagic posted that he in fact got Goliatherion copy from this banner.
So obviously I was opening more packs since my plan was to awaken the only mythic I was missing from the aviable banners on that day.
We had no way of knowing that the only way to get the Goliatherion copy was to hit 30 packs on it. We only got to this conclusion after spending that much.
We also could not predict what would be the solution to this mishap. Also this was the last day of this egg. I even said this:
That’s why we then asked for you to consider pushing the egg to the later date.