The ones they got mixed up was me and my brother.

What are you going to get us mixed up in?

When they come close, I try to mix them up.

You must have got me mixed up with somebody else.

Change the outside too much you mix up the inside.

Because people also want to see you mix it up a little.

You seem to have been mixed up in them already.

I went to my room, feeling all mixed up inside.

Three different issues must not then be mixed up, as has now happened.

However, we really must take care not to mix up two different things here.