Yes, I assume it is tension issues with the bobbin. That was the third time I put in a new bobbin while quilting it and there must have been something wrong with that last one. I'm just glad that the majority of it is OK.
The burgundy would look nice but I am 99% sure that I don't have any more of this collection or any fabric in these colors and I don't want to buy any. I'll have to see what I have that will look good with it.