The new FRED

The pink error message appears to be something left over from the old FRED. Only it's missing a number. It should read like this:

Each data series can only combine up to 10 individual series...

My Data Series 1 has TWO individual series, only one of which appears on the graph, contrary to the "a/b" calculation I entered in a field you can't see in the image.

I got the error when I created Data Series 2, with only one individual series.

I miss the old FRED already.