No reward from Wondrous Tails

[Darkstride]

There's a separate option to turn in your journal for the reward. Seems like you missed it?

It sounds to me like she told you that you already had a journal and needed to turn it in first to get your rewards. You then got a prompt, which you accepted, and she then replies with "if you say so, here you go". That implies that she tried to stop you from missing out on the reward but you chose a new book anyway.

I don't think it's a bug, I think you may have just made a mistake.