1 minute data samples

I am working on a analysis report that documents observations from a specific selection of date ranges for approximately 8 interfaces. As this is a work on progress, I have complete half of the report with utilization snapshots for 4 weeks worth of 1 minute data samples. Now that the date has crept over a month, the graphs are now using daily samples which look bad. (custom selection). Is there any way to force these graphs to use the minute samples given that I selected retain 1 years worth of minute data when the product was installed?

So to clarify, last Friday custom date selection used 1 minute data. Monday, using same custom date selection, NFA is using 1 day data.

Regards,
Cole.