Had perfect through level 5, now my points are all lowered! What happened?

[lpolite20]

I had all perfects on 5 levels of Duolingo! Now it says I only have 210 points! Do your points go away if you don’t actively keep going?? Help!

[Luis]

To mimic your brain, we decrease the strength of the words you haven't practiced recently.

[lpolite20]

Thank you. I wondered since it happened twice! Thanks for the help.

[kristinemc]

You can learn more about some of the updates to the skill tree that will be rolling out to everyone here: http://duolingo.com/#/comment/180620

[AnnInKeizer]

I'm looking forward to these changes. Any idea when they will go into effect?

[looceykc]

Something is wrong with my stats as well. I had finished everything above medium and now my scores all show as medium or below. My point total in level 5 is 356 but I'm not sure what it was before.

[Kicks]

Same thing happened with me. I replayed them yesterday to keep my perfect score. And today I log in today to see that I lost stars.

[Kicks]

Found it.
http://duolingo.com/#/comment/180620