For some of my data I skip days for collecting it so I use the shift key to
click on the days I do want in the chart. I have been doing this for awhile
but now that I'm obtaining more points it has simply stopped letting me add
data points. When I click on the one where it stops collecting it erases all
of the others I have clicked and makes a stop noise. I need to add more data
so why won't it let me??