We report here the observation of anomalous paramagnetic signal(s) in the isofield field-cooled cool-down magnetization scans (MFCC(T)) recorded for a single crystal of a low Tc superconductor Ca 3 Ir 4 Sn 13 . Novel features emanating from the MFCC(T) response include an oscillatory magnetization behavior below Tc and a rich multiplicity (non-uniqueness) in magnetization ranging from diamagnetism to paramagnetism at a given H,T value. The metastability in MFCC(T) has been ascribed to non-unique coexistence of multi-quanta vortex states (LΦ0,Φ0=hc/2e, L>1) and single quantum (L=1, Abrikosov) vortices. Additionally, the isothermal M(H) scans recorded across a short window of temperature just below Tc show evidence for only the multi-quanta vortex states in the domain of surface superconductivity, with no fingerprint(s) of pinned Abrikosov lattice.