I think you added some section markers on Plasma_application_launchers? Apologies if I've misunderstood, but it looks as though they were manually inserted. That can cause fuzzybot to go beserk ;-) To play safe I took out the markers <--T:37-->, 38 and 39, leaving your <translate> and </translate> pairs, then marked it for translation. The system immediately put them back where you had them, but if course the difference is that it now knows where they are and belong.
In short, translate pairs exactly as you are doing it now, but no manually inserted numbers, please.