Real server, they function perfectly fine on test.

Monsters range from Abyssea mobs down to lower level elementals, making sure that neither the normal monsters nor the elementals are negatively biased toward the additional effect's elements. Each spell and weaponskill was used enough times (15~20) to ensure reasonable levels of confidence in their inability to land properly; not a single one of the spells or weaponskills on the "broken" list landed more than twice, and all lands were for half duration.

Additionally, I used Elemental Seal on blue magic to ensure that it is a magic accuracy problem, ES caused the additional effects to land without fail.

Added Full Break to the list. It seems to support my theory on only certain additional effects being affected.
edit:Scratch that, false positive. the whole thing's broken.

edit2: added armor break

edit3: shell crusher too
Looks like it's a discrepancy between the test server and the live servers.