[teddyh]

You have made an assertion that a certain thing is a common occurence on Wikipedia, and have multiple times been asked for sources. The fact that you are still refusing to provide any sources (all the while claiming it is “really common”) is clear grounds for dismissing your point out of hand.

[Retric]

Here is one example: https://en.wikipedia.org/w/index.php?title=Pittsburgh&action...

Note all the editors messing up the correct Pittsburg(h) with and without the h in various settings. Lot's of +/- 1 edit lengths.

Now, did some how instantly validate my point? No.

PS: But it does illustrate the situation something is popular enough that many people see it, complex enough that it takes a little thought for someone to notice an issue fix it in good faith and then get reverted.