Correlations between various observables, e.g. multiplicities of particles produced in pp collisions at the LHC energies within intervals separated in pseudo-rapidity and azimuth angle, could be a sensitive tool to analyze hadron collisions dynamics and test hadron production models. In this report we present results of studies of multiplicity correlation coefficient topology for like- and unlike-sign pairs of charged particles using PYTHIA8 event generator. The correlation coefficients were extracted using long-range forward-backward correlation method. Peculiar behavior of correlation coefficient topology of net-charge is obtained in short-range region. Similar peculiarities are predicted in balance functions [1]. Analysis shows that effects of Bose-Einstein statistics have a strong influence in this region of such correlations. The results indicate the necessity of experimental studies of net-charge correlation topology that could bring new constraints to PYTHIA8 tunes.