Yes the Saline bag has been nerfed and only coughs up 500 blood. As far as slots are concerned the Saline bag can either be ready to (already connected to IV starter kit) taking up two slots, or not ready to go (no connected IV start kit) and only takes up one slot. If you get one not ready to go, you must combine with IV start kit which makes the package bigger now taking up two slots. Hope this helps.