hi @bioguo,
We have an additional outputs called loadings.star (which has not been mentioned in the help file, we will fix this).
loadings.star are the loadings recalculated based on the original matrix, whereas loadings are the loadings calculated based on the deflated (residual) matrix across the dimension of the PLS model.
It could be that the outputs from the package pls only output the loading.weigth = loading.star, you can investigate or read their help files.
Kim-Anh