An attempt at correcting something already correct and making it incorrect

Voluntarily Celibate.
A person who chooses to be celibate. Can be for any given amount of time, for a short period or for their entire life. Can be for religious reasons or not.

related: incel

when someone corrects you, only to find that they themselves were wrong

When someone tries to correct someone else, but in fact the correction is wrong.

When autocorrect changes a correct word to an incorrect word.

noun.
1: An exclamation that the other person is in fact incorrect. May only be exclaimed before correcting the other person's mistake, that is to say, when you as the speaker know how to correct the other person's mistake. In effect, the person proclaiming "incorrection" in fact proceeds to make a correction.

There are various ways that the word may be pronounced.

It may be pronounced just as it is presented phonetically in English. However, it is preferred to modify the pronunciation of the word and not speak it phonetically, and to give the word one's own unique quality.

It is highly recommended to pronounce the letter R in the word as the letter W ("incowection!").

The "tion" syllable in the word may be pronounced as though speaking French, with the "tion" being dragged out. Or the whole word may be pronounced as though it were French.

The speaker should relish every opportunity that he/she has to appropriately use the word.

2: The word may also be used pedantically when the other person is not necessarily wrong, and you are simply correcting a minor detail that the other person has made. However, this is not a very sensible use of the word and such word usage should be avoided.