If an inmate is granted parole and when she receives her parole papers it is saying that their is a detainor on her from the county where she was sentenced why would this be?

When there is another charge from a separate jurisdiction, that charging jurisdiction places a "detainer" on inmates yet to be adjudicated (brought before a magistrate or judge). Therefore, your loved one is facing another charge after doing the time for the charge she got paroled for.