I'm not an EG user, but I'll assume that EG is generating "proc gchart" code, and you're seeing "ranges" of values on the midpoint axis(?)...
If so, you'll probably want to specify the "discrete" option, so all the individual numeric midpoint values will show up on the axis (as separate bars), rather than being grouped into ranges (grouping numeric midpoint values into ranges to create histograms is the default in gchart bar charts).