Rotating large stacks of Mod Rods

[Linksfather]

I’m looking for some Dev verification. We raiding mages will create large stacks of mod rods that number over 100 at times. We rotate them before the rot timer exceeds the 5 minute mark. When I pick up a mod rod from a stack of 100, am I picking up the oldest rod from the pile (longest dropped timer) or the most recent rod dropped into that pile? Can anyone verify this? Thank you