Edit your original post for progress on that one topic. If a new topic comes up in the comments, you may post again with the new topic. Do not strikeout your post. When a question has been answered, insert a note saying so, and place it that segment behind an lj-cut with the text of "Solved."
so. when a question has been answered, put "Solved" before it and place it behind a cut (if it isn't already with the cut text of "Solved"). you may even wish to indicate which comment it was solved in by providing a link. or if you found the answer somewhere else, link to it.
example:
1. Solved - question one?
2. question two?
3. Solved - question three?
4. question five?
or. if the whole thing is under a cut, do something like:
1. Solved - question one?
2. question two?
3. Solved - question three?
4. question five?