For the benefit of anyone else who comes across this thread, I can see that I was expecting results which I have now obtained a different/better way.
Originally I did a Find Everywhere search for Workhouse expecting to obtain a list of people who died in one. It did reveal workhouse under Places/Place Details but I was hoping for something I now realise needed a custom report. Thus if I search from a list and ask for Death details contains Workhouse I get Workhouse + Union Workhouse etc.
What I would observe is that when I did a test by duplicating Workhouse in the Death Description field of one person, Find Everywhere calls this Death detail which, at worst, is just a little inconsistent but not a problem.
Jerry, thank you for pointing me to that facility; I have tidied up/merged my RM file places a great deal.
As regards the specific problem I had, I have been able to use Find Everywhere which brings up a neat result table with clickable links so I could find what I was after and edit instances of it. Luckily not as long a job as a feared.
Find Everywhere fails to find the word Workhouse in the Death fact field. Is it that some searches will not yield the results expected?
I was not quite correct in my last post when I said 'Clicking Generate report includes ALL the tasks'.
I have 47 tasks in total, all OPEN in my RM file. If I print them all sorted by priority the output is correct.
If I select ALL tasks of Priority 5 and lower I get tasks 1-29 but also 30-35 (Priority 6) In fact if I select priority N then I get tasks up to N+1 as you did.