maybe I'm not doing things right, but when spellchecking a text with a number of repetitions, when I correct one of the repetitions the other reps are still presented. Once corrected, that segment should not be presented again. I did not find any settings to avoid this.
I understand you use the QA step "Check spelling in target segments". In that case, Ctrl+L is the way to repeat (and refresh) the last QA step, as Hans said above.
However, I believe there is a better way to conduct this check in CafeTran,
Task > List words with unknown spelling.
This shows a list of words non recognized by the spellchecker. Saving correct words in the user spell-check dictionary is just a matter of clicking the corresponding word/button. Those will no longer show up as red/unknown from now on. Ctrl+Click filters the segments which include the word in the Grid, so that you can review them and/make other changes.
Thanks a lot for your suggestions, this opens completely new horizons to my QAing.