Bad cut, so wobbly when pulling

Is now my 5th Duorollo but every time another provider. Imgrunde they are determined all in China, etc. manufactured until today was always satisfied but well, is now the first in 2 meter length of the balcony patio door, you realize that the fabric is not cut properly because the high rollers jumps back and forth like a garden hose during winding on a roll.

It quietsch also temporarily pulling up, but that can be determined with a few drops of oil to eliminate.
It is now, I think even the 3 times it's been bursting anything by sending to the edge, but does not present a functional consequence, however, that your marketing concept should reconsider.

On the whole, it does the job and is mounted in 5 minutes.