"not symbol"?? Don't know what you mean. (do you mean the prohibition symbol like the "no smoking" sign sort of thing?
Try the Machform demo, https://udlklocltfm.machform-trial.com
See if you can repeat the problem you're having
I tried it with the demo, and drag and re-rder works for me.
What version are you using - the most recent release is v7.