Don't know if you've noticed, but there's a faint-ish dot just below Callisto (?). It's most likely a star, although it doesn't appear in any of your other pics, so it maybe an artifact of some kind. However what I was going to say was..." That's not a moon, it's a space station!!!!"
I think that's Io and Callisto. Both were clearly visible when I bumped up the gain, as was Europa when I moved the scope. Sometimes processing removes them, if I bump the levels up in Photoshop they re-appear.