Daily Sudoku problems are back

When i played last, I completed quite a few games and earned the tulip theme wall paper.  I was puzzled by the fact that it kept telling me that I had earned the three day streak every time I finished a game, but over all it seemed to be working.

Today, I went in to find I no longer have a streak; it told me I'd missed two days.  I thought I was in the game yesterday.  I dismissed that rather than try to recover my streak since I wasn't convinced the streak thing was even working.  Then I saw the 15th and 16th are locked, and I no longer had the tulip theme.  It says I have to collect 21 more stars to get it.  That makes no sense.

So, it's forgetting stars again and the streak thing doesn't seem to work at all.  Please fix this, again!