Report not refreshing daily


I created a report from one of my sheets and the report was inaccurate when my boss looked at it at 10:00am MT this morning. He called me so I got on around 10:38 and hit refresh on my end and then the report was accurate. Why is this? All the data on the actual smartsheet was showing correct for him but the report itself was not matching the smartsheet. He said he hit refresh a bunch of times on his end but it still didn't update until i logged on and hit refresh.