This article was the first that I'd ever read of this, with such by detail. It seems very tricky!
My understanding is the old tradelines should stay on for 10 years. But the late should fall off in 7, from the DofD. So if it's a string, the whole string. I wouldn't do a dispute though. Imo it could risk getting the whole thing being removed.
I'm not sure though.
This is what I believe happens as well. Since it was a positive tradeline, but had lates, the lates should just age off, leaving a positive tradeline until up to 10 years from when it was consolidated/closed.
I am not sure they are considered positive trade lines anymore, they are marked closed, derogatory on my reports.
It's funny though... they have a removal date listed on Transunion, so I am guessing that when the string of lates hits, the entire trade line will be removed (the lates were up until the accounts were closed).
Sounds just like my (old) student loan lines, in which case, I would think they'll fall off/be deleted at the 7y mark.