The first two bags went fine with the "wave" stitch". But this vine stitch is a different story. Let me show you what I mean. It doesn't seem to matter whether I use 2 or 4 layers. And no, there's no nap to the fabric.
The tension is set to auto, the stitch to its auto-programmed one. I have not changed it in these samples. My thread is the same--Connecting Threads in the same color in needle as bobbin.