A pic of a codedump never hurts, also did you delete the lists folder in the cache folder? - /wiiflow/cache/lists I don't get any codedumps viewing the emunand, I recently had to recreate my NAND and start fresh, then just backed it up in case it ever gets corrupted again in the future. All the savegames is pretty much all I was interested in.
Take it one step at a time. Make sure to try everything with default settings first like Etheboss suggested. That means default theme, no fanart, no source menu and no plugins at first. Delete your wiiflow.ini let it recreate the ini file then point to the path of your emunand. Currently using r783 and things are very stable.
If all else fails, delete your e-NAND then create another NAND w/ModMii, launch it first then sync your remotes and settings and use the cert.sys app by fix, or use the WiiFlow NAND Extraction feature and use ShowMiiWads to remove and add whatever you need. I'm sure you've been here >>>
http://gbatemp.net/threads/wiiflow-mod-and-emunand.333219/<<< already but maybe give this another go, look at the latest posts for some tips on issues for emunand