Track Pages (Again)

I asked about this years ago; people were able to explain items that were marked "updated" or "new", or showed that comments had been added, but the vast majority of the entries on the Track pages don't have any of that. The ones on my pages are (presumably) stories that I've read at some point in the past twenty years, but some are showing relatively recent dates even though I literally haven't looked at them in years.

And as I said last time, it's not just me. Deceased authors/readers have recent track page entries -- Wren Phoenix, to name one, has more than three pages of them that are less than a year old, and only the first seven have "new" tags. Some of them are multi-part stories, but not every part is there: her Somewhere Else Entirely list shows chapters 23, 24, 37, 38, 42, 46, 58, 60, 61 and 62. Angel O'Hare has more than a page of entries over the couple of years; similarly, a number of them are Sarah Carerra chapters, but not in sequence and with some of them missing.

Conversely, there are authors here, recent and otherwise, who don't have any stories on their Track page except their own. Marianne G seems to be one, though I only went through her most recent ten pages. Eolwaen is another. Michelle La Zorra, Aidra.

Clearly there's something here I don't understand, and I'd like to -- if only to be able to determine whether some no-longer-active authors are still monitoring the site.

Can someone help?

Thanks,
Eric