Both of the statements above are correct observations. Yes the universe exhibits large-scale homogeneity; you see the same kinds of things in all directions. The large-scale universe looks a bit like bubbly froth.

But yes, there is slight unevenness, because there is that froth -- clusters of galaxies, with voids around them. Scientists think that something happened in the first fractions of a second after the big bang to cause this, and it might be tied up with the reason why there is also a dominance of matter (as oppsed to anti-matter). I've never claimed that scientists know everything. It's an interesting question because it requires knowledge about states of matter which no longer exist in the universe today.

Do you have a problem with any of this?