Trapped chests/Isabelle's kids

I'm in the middle of step 27 in the walkthrough, where we take Seiman back through the fortress to open trapped chests. I successfully went up the secret path for the war powder, stone flute and power salt, b eon helmet, war-god helmet and 3 power peppers. The instructions say to return to the main path. I'm not sure which one is the "main" path, but have walked in circles all over this level and the one above. I can't find the chest with 2002g, or any of step 28. I did find a chest with omega budon and 4 mithril drops, which I don't see in the walkthrough.
Any help?
Any help?