>>eps+(OP)
I think that's a good thing. If you learned a false fact based on a typo, you may want to treat the true fact like a brand new fact to be learned.
>>victor+EQ
Don't you just put tick "know this already" or whatever mechanism is used. It'll be asked a couple of times but it shouldn't be "relearned from scratch".
>>eps+(OP)
I did something similar in markdown as the author, but my solution was to generate an unique anchor with a unicode symbol after each answer.