David, I have had the opportunity to follow myself inspecting the same property on several occasions and find that most items are never addressed at all. Sad to say, but I think you have found the rule rather than the exception. I think most folks just want to know if there are any big financial issues and most of the rest gets lost in the shuffle of the purchase transaction and moving. I had one guy call me wanting to turn in his termite damage on my insurance over a year after the inspection even though I told him in three different locations on the report that the house was eaten up by termites. Said I should have told him more strongly that there was an issue... glad I put it in writing.
Like they say, if it is not in your report, it did not happen. Glad it was your clients that came to tell you about it 3 months later and not their heirs attorney!

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Jim Luttrall
Mr. Inspector.net, Inc.
Allen, Texas 75002