If you have 4 pages of Reagents, you may have some of your reagents "drop out" of you backpack. It appears you can only hold 4 pages of reagents, and there do NOT spill into your backpack. Until Kings Isle (KI) has a chance to fix this, sell any ingredients you don't need at the moment to clear space, or you will lose them. This happened to me, as I lost 6 springs, the last time I bought something at the bazaar! I will let you know of KI response when I hear back from them. But in the meantime, don't have more that 4 pages, or you will loose reagents.