Alan,
I can understand the frustrations, an example in this thread would be information for Drury M. Lovins.
In one post I noted Drury was captured three times, I never found any info on Drury's capture at Port Hudson in the Ancestry database and actually gave up looking.
I did find him listed at this web site which I believe is an accurate source.
http://pth.thehardyparty.com/index.htm
Mitch