I have for a long time noticed that sometimes when I manually change the status of a LingQ, the highlighting of that LingQ does not change, but instead, the highlighting of a different LingQ actually changes. When this happens, normally I just refresh the browser and the correct words are highlighted in the correct way. I just noticed something a bit more about when it happens.
This happens to when I edit the hint of a LingQ and then select a different LingQ and change the status on it. When I do this, the highlighting of the selected LingQ does not change, but instead, the highlighting of the previous LingQ changes.
Just thought I would let you know. This happens on at least two browsers (Firefox, and Safari on the iPad).