How do your other corals look? 9.4 is still okay. Ca is less of an issue than alk and if corals look okay, I'd just start dosing a little less. Water changes should help bring things back to normal.

As a word of caution, always be a little skeptical of all test kits. I tend to use them more as a metric to determine stability of my tank (ie., is the reading the same from test to test or is there a big change). I wouldn't place bets on the actual analytic value of any test kit. Its just a tool to help you maintain consistency. Again it is all about how the corals are looking.

If it is just the candy cane, I think your problem is less systemic and more individual light/flow conditions.