Pawel,
This is just a guess, but is your model pulling in all records, or do you have a limit set? Charts only summarize the data currently in your model, so if you’re limiting the model to, say, 200 rows, those two quarters may just be absent from your data set. In the Skuid Page Composer, click on the model your chart is using, then the Advanced menu, and check the value of the Max # of records (Limit) parameter. Adding a table component to your page tied to the same model as your chart is an easy way to quickly view the data being summarized by your chart as well.
