<p>The manifestation of two types of moisture mode theory in eastward-propagating MJO events was investigated based on the cluster analysis with the diagnosis of observational data during 1979–2023. Three MJO events are not satisfied with the planetary boundary layer (PBL) moisture leading (non-ML), while one MJO do not fit the MSE tendency asymmetry (non-TA). Through the moisture budget analysis on non-ML, the anomalous descent at the PBL is responsible. Under the superposed effect of the descending branch of MJO overturning circulation and ascent in the east, westerly appears at the top of PBL according to Gill response, leading to high pressure and downward motion due to Ekman pumping mechanism, eventually causing negative moisture tendency. After the accumulation of negative tendency effect, there exists negative PBL moisture leading. A MSE budget analysis indicates that the descent in the rear of MJO plays the key role in non-TA. Due to the narrow MJO convection, there is all-level descent in the rear, leading to positive vertical MSE advection and MSE tendency, finally resulting in negative MSE tendency gradient. It is worth noting that the one non-TA MJO also belongs to non-MA. A mean state modulation mechanism is proposed. A CP-El Niño like SST pattern appears with prominently positive rainfall in the central and western Pacific. Modulated by the more unstable background, a shorter width of MJO vertical overturning circulation and multiple branches of ascent are preferred, resulting in westerly response leading at the top of PBL and descent in the rear.</p>