Yes, other FE groups exist and they're very different from us. I'm surprised that I need to explain this, but I'm not going to take responsibility for these other groups. If you have an issue with something they say, take it up with them, not us.
Then let me try to explain the "moon problem" to you - perhaps you could explain your personal point of view about it? You're surely not going to dodge this issue are you?
At some point in time, the moon will be vertically overhead some point on the Flat Earth - right? Let's suppose that place is on the equator at the zero meridian - right about on the West coast of Africa near the city of Accra. When someone tips their head back and looks at the moon - what do they see? Something like this pattern of mareis and impact craters?

OK. So if the moon is a round ball, then we're seeing the "bottom" hemisphere of it.
Now - suppose we're in London at the same moment in time. Because the moon is about 4,000 miles to the south of us and about 3,000 miles up - we should be seeing it in the southern skies. But we're definitely NOT looking at the underside of the moon. Maybe we can see much more of the top of the moon than can be seen from Accra - and some of the bottom part must be obscured. So maybe we can't see that giant "splat" that is Tycho crater because it's off on the other side of the moon from where we're looking.
Then, consider someone way south - maybe on the coast of Antarctica (maybe on the Ice Wall) - now, the moon is in the Northern skies - and again we can't see all of the bottom half of it - but Tycho crater should be right in the middle of the moon's disk.
We can go further and imagine views from the East coast of Mexico and India - which would let us see yet different sides of the moon.
We'd be able to see almost all of the moon's surface - and the image of the moon would look VERY different from each place.
Needless to say, this doesn't happen.
Worse still - what about the PHASES of the moon? If the moon is full in India - then it should be a new moon in Mexico, and a half-moon in London and Antarctica.
The amount of the moon in shadow is (in reality) the same from everywhere that the moon is visible.
Can you explain this? I don't think so.