  We show anomalous features of Majorana Bound State leakage in the situation
where topological Rashba nanowire is dimerized according to the
Su-Schrieffer-Heeger (SSH) scenario and an impurity is present at one of the
ends of the system. We find that two topological branches: usual, indigenous to
Rashba nanowire and dimerized one, existing as a result of SSH dimerization of
nanowire, have different asymmetry of spin polarization that can be explained
by opposite order of bands taking part in topological transitions.
Additionally, introduction of an impurity to the dimerized nanowire influences
the leakage of Majorana bound states into the trivial impurity, due to the
emergence of Andreev bound states that behave differently whether the system is
or is not in topological phase. This results in the pinning of zero energy
states to the impurity site for some range of parameters.
