Has this ever happened to you? You want to knit in tuck and end up with a bunch of sloppy loops instead. Arghhhh!
Remember the construction of a tuck stitch. The tuck needle is skipped and the yarn loops over it.
What happens when you try to tuck more than one needle side by side? You’ll get large, sloppy loops.
With automatic patterning machines, you need to instruct the machine which needles will be knitting and which ones will be tucking.
Check the “negative” variation setting on your machine.