IR is a perfect trap for those of us with OCD
I stopped caring too much about IR when I realized that readings usually weren't repeatable. In other words, the variance with back-to-back readings was high enough that it cast too much doubt over the integrity of any given reading. However, I do like that the cells within each of your packs are evenly matched in terms of IR.
There are several great articles out there on IR...
here's one of them.
He states:
This begs the question: how low should it be? Unfortunately, there's no easy answer for this. It's all dependant on your use case and battery. What is great for one battery may be terrible for another. Based on my online research, combined with my own experience and findings, I would say, as a general rule, a per cell rating of between 0-6 mΩ is as good as it gets. Between 7 and 12 mΩ is reasonable. 12 to 20 mΩ is where you start to see the signs of aging on a battery, and beyond 20mΩ per cell, you'll want to start thinking about retiring the battery pack. But this is only a guide - there is no hard rule set here. And if your charger doesn't give you the per cell measurements, you'll have to divide your total count by the number of cells in your battery to get an approximate per cell rating.
Based on that, you're good to go. Like Marco said: if you're getting good performance out of the pack and it's not puffing or getting hot, carry on.