Peter Cannon is a separate account from dick_turpin, so of course your timeline will be different, because both your accounts (probably) follow different people and different people follow each of your accounts. And even if I'd follow both your accounts (which I do, maybe) I might decide to share a post with your identi.ca account but not with your microca.st account. So your timelines might be similar, if you follow the same people, but they will never be identical. And even if everyone would treat both your accounts identically, your timeline will STILL be different, because your own posts will of course only appear in one account. My advice would be to use one account and leave a note on the other one, so your followers can find you again.