This has been going on for at least six months. If I re-list an unsold item, it will not appear in the categories latest postings. The so-called "indexing period" does not apply here. However, if I make a new listing, and I use the same photos, title, and description as my unsold item, it appears immediately in the category, as it should. So, instead of it taking five minutes to re-list 100 of my unsold items, it takes me many hours, spaced out over a couple of days, as I have to get the photos, cut and paste the description, etc. Want proof? Yesterday, I re-listed 27 unsold items of mine, all in 7 day auction format, all buttons and pins, all under the category of "Collectibles:Religion:Judaism". If you go to the category right now, you will not see ANY of my listings that I posted on 7/28. Not one. The only ways someone can see these listings is if they click on my username, and see what I have for sale, or, do a keyword search that matches what I have. So, I am losing 95% or more of my audience, who, like you and me, look at a category every day, or every other day, and scroll through the new listings. Anyone who does a search this way WILL NOT see my listings. This is very disturbing, and it looks like this "problem", is going to be here for a long, long time.
