My submissions to the DB include measurements of the full sequence. Accordingly, I don´t see why confusion should happen. If the sequence changes, through the addition of fainter members perhaps, all significant information is present to reduce to the new sequence.
For the example given, a snippet of an entry would look like
VarAbsMag VarAbsErr CmpStar RefMag RefErr CMMag CmpErr
[19.6203 0.0123 169 16.862 0.022 16.765 0.0095
where everything other than “169 16.862 0.022” is fictitious, invented as an example, and the CmpStar through CmpErr fields for the rest of the sequence have been omitted here for brevity; they would be present in the true submission.