In the past, it seems that versions of songs were added to the DT without checking for accuracy, representative lyrics or attribution. This is one of those hindsight complaints. Through the threads, more accurate and complete information has been obtained but has not appeared in the DT. I have thrown out complaints such as Malcolm has done above, which is easy to do, but when it comes to solutions---

The reason why the DT material has not been improved is obvious- it takes time and knowledgeable people to make a decision and make revisions. Who is willing to take the time??
The study threads, compiling the best on particular songs, I felt was a good move. From these, more representative versions could be selected for the DT. But this is going to take more than Joe and one or two helpers to accomplish. There is just too much to check.

In the meantime, unless a whole batch of good samaritans comes forward, perhaps, as has been done- close off threads that aren't needed and combine anything new into the main thread- but even that takes time that few have.

If we recognize that a new thread is duplicative, we should try, (like Malcoln has done above), to point out the pertinent thread and refresh it, leaving a note in the new thread asking people to please use the earlier thread. The redundant thread could then be cut off.

Usually, I have tried to indicate earlier material when answering a question, but it is less time-consuming to answer a question without taking the time to go back over the old threads- as I did here.