I wouldn't throw them out.
But 1 gram for 3 grams saturated is bad. Bacon and butter are like .3 trans for 10 saturated. And that's high for unprocessed food.
In general, I would rather eat 100 grams of saturated fat which is unclear whether it is bad for you and is debatable, than 1 gram trans fat, which everyone agrees is bad.
It's not the blueberries themselves. I'm not aware transfats form in fruits and veggies in any kind of noticable quantitity. It's likely hydrogenated oils in the mix.
What I would do is: eat them. Then throw out the mix, and next time you make the muffins, use something else for flavour.
Are you sure Power Drive is as effective after baking?