Recent results on net-proton multiplicity fluctuations of the STAR
experiment from the beam energy scan (BES) program at the BNL Relativistic Heavy Ion
Collider (RHIC) have drawn much attention to explore the QCD critical point and the
nature of the deconfinement phase transition. The non-monotonic behavior of
$\kappa\sigma^{2}$ around $\sqrt{s_{NN}}$ = 19.6 GeV in the STAR results even
increased the excitement in the field, as it may be associated with the existence of
a QCD critical point. Although the presence of many statistical fluctuations become
the background for the dynamical fluctuations and it is important to
disentangle and identify them to have a correct interpretation. The recent findings
for the stopped proton fluctuations and event-pile up scenarios as a background and
their influence on the interpretation of net-proton fluctuations are discussed in the
present work.