Grading Issue, help!

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Why is it that when I apply grading to the cut line, it doesn't apply to the sew line, and vice versa? I have been using this program off and on for over 20 years, I'm using the cloud program and paying quite a bit for it, and this issue still exists? I remember this being a problem in Version 4! Is there a trick to this? Do the programmers know about this issue?
The base pattern is complete, grading stage is on and after grading a pattern, I see that the grading didn't translate to the sew line. What a mess. I worry about conversion now and if it will work properly. Its confusing to see the sew line take a different grade and I cant rework the illustration line in with the cut line showing.
Help!