chart null category

Can you post a screenshot of your Category Axes definition and Series definition? 

This may sound like we don’t trust you,  but we do think that something is amiss in the model.  We’d like you to put this model data in a table on your page,  just to make sure there are no empty date values,  or other data that seems wonky. 

Just know:  Dates are wierd. 

Agreed, I’ve some weird dates in my day. 😃

As long as you are wearing that shirt, all your dates should be good.