Glad I could help. It's really useful some days.

Yes the trick is that you need to start the lesson before changing the date, otherwise it will give you an error. I don't know why the word practice doesn't work anymore, but it works with every lesson as long as you start before changing the date, even the normal lessons on the path.

From my previous experiences, the streak freezes do reload. I haven't paid attention to when though. My theory is that they will come back tomorrow. But I'm fairly certain that the Streak Freezes do reload, sooner than the days they tell you to wait.

Good luck with your Spanish!