  We present the second results of an ensemble and systematic survey of
oscillation mode variability in compact pulsators observed with the original
{\sl Kepler} mission. Two types of flux calibrations, raw and corrected,
collected on two hot B subdwarf stars, KIC\,2438324 and KIC\,11179657, are
thoroughly examined with the goal to evaluate the difference of patterns when
oscillation modes modulate in amplitude (AM) and frequency (FM). We concentrate
on AMs and FMs occurring in seven multiplet components in each star as
representative frequencies. The analysis shows that FM measurements are
independent of the flux calibration we choose. However, if flux contamination
by nearby stars is large, AMs may be significantly different between raw and
corrected flux. In addition, AMs suffer, to some extent, from systematic
modulation pattern which is most likely induced by instrumental effects {and}
differs from one star to another. Our results indicate that stars with no
contamination are better candidates to quantitatively compare modulation
patterns with theory and should be given a higher priority for such studies,
since light contamination will destroy real amplitude modulation patterns.
