Reporting module not showing the same values when saved as pdf

I have been trying to create a basic report with some information from tags.
Here is a picture of the pdf created and the preview of my actual ignition application and as you can see the runtime and alarm time (both are DurationOn historical tags) do not match what they preview as, the other two numbers (Count On historical tags) do match and ive repeated this a number of times i cannot find what the reason for it is

What am i missing here?

Instead of using a “tag_history” datasource with aggregation mode of “Duration On (Seconds)” i used a “tag_calcs” datasource also on “Duration On (Seconds)” instead and it seems to work, not sure how these are different but thats life