If Tartib was waived because six Fard prayers had accumulated, the source says it does not automatically return merely because the person later makes up some prayers and the remaining number falls below six.
The source also gives the correct view that a newly missed prayer does not simply restore the old ordering requirement after the previous six-prayer state had already removed it.
So the six-prayer rule changes the person's ordering status; it is not recalculated from zero after every individual Qada.