I posted about this in Ask the Writers months ago and got no response so I kind of feel it has to end up here, unless someone can point out a solution I have racked my brain failing to find.
A Rock and a Hard Place - novel by William H. Keith, Amazon ebook version, multiple chapters but starting in chapter 2.
Issue: Multiple Gray Death Legion personnel who died in previous fiction appear alive and well in this book.
The first one is Francine Roget. In chapter 2, Grayson is training her. Later she accompanies him, piloting a Panther, in his mission to Wheel. However, back in In The Price of Glory, Francine Roget dies during the imbroglio on Helm. To be precise, Grayson watches a Marik Thunderbolt approach her position, raise its fist, then lower it, and hears Roget scream. The only time she is mentioned after that, it is in the context of people who died because of the treachery of "Harris Graff."
Sylvia Trevor is mentioned in the same sentence in TPoG about those who died because of Graff... and yet also is there in the Wheel Station fight in ARaaHP, getting first mentioned as alive and well in chapter 14.
There are no dates in The Price of Glory, but the GDL scenario pack puts it in March-April 3028. The events in ARaaHP take place in August 3028, and the events on Helm are explicitly described in ARaaHP as taking place in the past.
Edit: Clarified time when the events on Helm take place based on info from the GDL scenario pack.