Same thing happens to me. If by chance i want to edit keyframes again, i go to LR, make the changes, go back to grid view, select all keyframes, save metadata to files, reload in LRT, Apply transitions and create visual previews and it keeps showing previous edit. I also tried reloading metadata on LRT import window, go through all the process, but still, previews are always with the same edit i did in the beginning. Any help on this Gunther? Thanks