Didn't even notice that no it isnt a defect my clear pod is the same had to look at the 2ml pod to see what you meantI ordered mine from ecigone. Not sure if mine had a manufacturing defect or if this is how it's supposed to be, but mine didn't have the little plastic line on the top of the pod, that clips into the device to hold it firm.
I actually prefer it to the 2ml, makes taking the pod in and out super easy.
I tried a Sprite coil in mine already, it's not as good as the Artery ones.It watched a review yesterday and found out that the pal 2 and Pro take Spryte coils.
That opens up more possibilities, I have loads of those as well.