so you talk to the guy by the entrance of the brig
party on the left storage box on the right
when you select a party member to switch with the storage box
there is an invisible empty slot it will always be at the bottom on your storage box character list. that is how you deposit a member directly into storage. Once the party slot is freed up you select that empty slot on the party and select the member from storage. its a round about why to do this but it avoids that weird crash from happening. as for the Vine thing i cant remember.