This is a project originally started in PPro CC 2014.
Now I have resurrected it in PPro CC 2015.2.
Everything looks and acts normally except:
The sequences currently in the timeline when PPro is saved and closed do not reappear on the timeline when PPro reopened. They have to be relocated in the project window and manually reopened on the timeline every time.
I've never encountered this before and have not found any setting or preference that corrects this annoying problem.
Would appreciate any ideas...

Hi Bob,

Try creating a NEW PROJECT, then IMPORT original project into it, see if that helps.

Thanks

Shazam... worked like a charm.
I thought I had already done that, but obviously not.
Thanks