I've had something come up in most of the versions of xlights I have downloaded. I'll set up my timing grid and while sequencing I'll have some timing marks that act like they're not even there when I drop an effect into a block it spans across the timing grid like it doesn't exist. I've had something similar happen with copy and paste. Not sure if I did something wrong or if it's a bug. I had one sequence was so bad I recreated the timing marks with a new timing and then deleted the old one. Is there a way to fix this when it happens?