You are correct, the numbers being displayed on the Item Summary are incorrectly calculated. We will get this fixed and posted shortly.
The update has been posted, the max numbers you see displayed should be a true indication of what you can bring in to battle. Included in these totals, the number of items you can Arm your character with. For example, ships would be the total number of generals you have plus 1, since you can arm your character with 1 ship. Since you can arm two weapons, look for your max count to equal 10 * your general count plus 2. etc. Please post if any of this is unclear.