Monica, was it thinner tearaway that they layered?

I would of used cutaway also
They may have done it the cheapest way... You can't tell a lot now but after wear and several washings see how it holds up

I worked in a sewing factory making ladies sportswear for over a year, they NEVER follow the rule of thumb we learn from experience and cuties! They probably have a stack of sheets pre-cut laying next to them and just grab some.

Monika, there is absolutely no difference between tear away and cut away.They both have the same stabilization strength.Cut away has been around for a lot longer then tear away and still doing a superb job. So, why use cutaway which is much dearer, instead of the cheaper, true and tried tear away?
If you are familiar with Sue Box Designs, her testers always use 2 or 3 layers of tear away on her designs.

Cut-a-way is normally used with fabric that stretches so that it holds the design together from the giving of the fabric and laundry.

Interesting - I don't see that it would be a problem - let us know - after you wash it a couple times - I bet it has more to do with what they had - at the time that went through the lines.