[PvK]

I'm pretty sure that the sequence of the items on the right side determines the order of ships to be repaired. That is, if my right side starts out:

Weapons
Engines

then if I have two damaged ships in the same sector with repair yards, and only one has a damaged weapon, but both have engine damage, then the one with the damaged weapon will be repaired first, starting with repairing the weapons on that ship, then its engines, then the engines on the ship which had no damaged weapons.

So, I don't think there is any reason not to have everything listed on the right - the left is mainly useful to arrange the sequence of the entries on the right.

PvK