In the image below, you can see that corruption is anticipated to tick 6x, every 2.61s, for a duration of 13.58s. These numbers don't add up (6 * 2.61 = 15.66). Corruption duration is longer than the expected 13.58s, and 15.66s feels about right. Perhaps Eradication is accidentally being treated as a permanent effect? When it did proc, the prediction was even lower (and still incorrect).
Haste isn't being factored into corruption correctly with Glyph of Quick Decay.
In the image below, you can see that corruption is anticipated to tick 6x, every 2.61s, for a duration of 13.58s. These numbers don't add up (6 * 2.61 = 15.66). Corruption duration is longer than the expected 13.58s, and 15.66s feels about right. Perhaps Eradication is accidentally being treated as a permanent effect? When it did proc, the prediction was even lower (and still incorrect).