Pushing an existing Git repository to Github only sends about half the commits?

Question

I have a local Git repository I\'ve been developing under for a few days: it has eighteen commits so far. Tonight, I created a private Github repository I was hoping to push

Answer 1

I've had this same problem twice, and finally figured out what I was doing that was causing it. In the process of editing an old commit with git rebase -i, instead of calling git commit --amend, I was calling git commit -a by force of habit, immediately followed by git rebase --continue, of course. Someone else might be able to explain what's going on behind the scenes, but it seems that the result is the detached HEAD problem.