@Element I haven't played in a couple months, but just checking the Wiki now says that the vanilla encumbrance value of a potato is 0.2, and a sack of potatoes takes 12 potatoes, which is a total of 2.4 encumbrance loose, and becomes 2.0 encumbrance as a sack, netting you 0.4 encumbrance saved. Make sure you have no other mods that affect these encumbrance values. If that is not the case, then you must be mistaken, I would double check to be sure. My mod does not affect the vanilla values except for those described above.

can you look into the potato sack please, I think its also a net loss in encumberance

Ayo, thanks for this!