I am having problems in cancelling new LingQ I have learned. Once I could click on each of them and cancel but now they are not added anymore to the ones I know.
With the recent update, we combined the delete and ignore functions, so deleting a LingQ will also cause the word to be ignored.
I encourage you to leave the LingQs at Status 4 rather than deleting them. Even if you know learned the word, you may forget what it means in the future.