Need help with rifting event/rotation file

I’m working on a new rifting event (my second since the initial super continent split) and I’m running into some trouble.

I’m looking to split the continent along the rift that’s highlighted in orange (and some portions white because it began as a failed rift). Currently, all of the cratons are set to follow the the blue plate, which is Plate ID 100. I believe I have successfully coded my rotation file so separate the pink plate, Plate ID 300, from Plate 100 so it can move independently, but where I’m hitting a snag is trying to the orange plate, Plate ID 800, to follow Plate 300 now.

Above is what the world currently looks like at 900mya, and in the comments I’ll put a picture of what happens when I move forward—the orange plate, Plate 800, immediately launches on top of Plate 300 (along with a failed rift that also has Plate ID 800) rather than maintaining it’s location and moving in conjunction with Plate 300. Have I done something wrong with my rotation file? (the line breaks are just so it’s easier to read the coding for the 2 plate movements in questions, Plates 300 and 800).

Any help would be greatly appreciated!

Here is what happens after progressing forward in time from 900mya

And here is my rotation file (the line breaks are just so it’s easier to read the coding for the 2 plate movements in questions, Plates 300 and 800)

Your plate 800 rotation sequences don’t look correct. At 900 Ma it jumps from 100 to 300 and then back to 100. Maybe it’s a typo because it doesn’t look like the crossovers in your other sequences.