Issues with Data Labels on a line graph with Markers

I am using a line graph with markers to show occupancy rates for a series of properties.  I want to show a rolling 6 months of data but when I deselect Jan 18 from the x axis the data label disappears from the marker for Jul-18.  If I select Aug 18 the data marker appears for July but disappears for August. 

Any ideas on how to fix?