Some of the flows don't do exactly what they're supposed to. They are:
Poison Filter 2: In addition to poison resistance, increases Focus by 2.
Loose: In addition to sore resistance, increases Focus by 1.
Resist 2: Does not prevent soreness, instead prevents confound.
Peace 3: Has Oneness-Blood attributes.
Perfect Blood: Prevents Confound, Berserk, Nitemare instead of Poison, Bleeding, Helpeless. Also has Oneness-Blood attribute (which applies, but Flows shouldn't have attributes).
Cold Blood 3: Has a 60% chance of prevention when it should have 90%, prevents Frozen instead of Burning.
Wallback: Has Elemental-Earth attribute (applies, but shouldn't have).
Safety Gust: Has Elemental-Air attribute (applies, but shouldn't have).
Singularity: Does not prevent Bleeding.
Universal: Adds +5 Poise.
In addition, the Aquifer and Dust Bowl Auras have a Oneness attribute they shouldn't have.
A few other things, Slade's Loner skill is supposed to give a 70% prevention of certain stats, but the level of prevention is set at 0%.
And something that may or may not be intentional, Kloe's Revenge of One skill item description says it gives a 20% paralyze chance but it actually only has a 10% paralyze chance.
Note that all of the above bugs deal with the Items section of the rm2k database.