If you scroll down through the second link you get commentary with charts.
If the link works, it gave thoughts after the report. Focus on the last chart below. That chart was fulfilled Monday as May corn reached 7.20.
Because of the way barchart rolls the nearby contract, the chart below doesnt look like may corn made it to the uml but it did.
For those of you who studied zGordon Deruse Andrews info, he has a section in there about gaps (circled in green on the chart) being used as forecasting tools and the more times price touches that point the more valid the measurement.