I was having this problem before I even added the "force refresh" code you pointed me to. My problem was never that the IIP wasn't updating...it was updating every visit to the page.
I did add the code you pointed me to. I have all my PAL cache's set to a minimum of 45 minutes, and I set the force refresh code to 40 minutes (or 2400 seconds using the code snippet you referred me to).
This is frustrating...everything seems to be working fine except for the fact that my cache is being completely ignored.
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