If you link a Sequence it seems to delete any cue times attached to the original Sequence and Oops does not bring them back.
Store Sequence 1 Cue 1 CueFade 1 CueDelay 1 notice that cue 1 has a 2 second duration.
Assign Sequence 1 at Sequence 2 notice that both Sequences no longer have timing.
[Oops] Linked Sequence is deleted but original timing is gone :(.
It seems that Individual timing is preserved but all other timing is lost.