Welcome to the SeeMeCNC Community

I have a big model.
Look like hafl a cirlce, like half moon.
Metter Control put it based on a center.
I try to move it. Push the Save button and get nothing.
Moving doesn't save.
Something wrong?

Find the "Center On Print Bed"(Or some similar crap) option in the settings and turn it off. It isn't respecting your edit because the setting overrides it.