You know what really grinds my gears? When people "abbreviate" the word until to till. I've seen it all over the place, including in the business world (restaurants, bars, etc.).
In what universe would you add and extra letter to something you are abbreviating? And don't even get me started on the missing apostrophe.
What makes it worse is that till is a word in its own right. Maybe I should move this to the farking Rage Cage!
Learn
Teach
'That'll learn him' is incorrect. Of course it should be 'that'll teach him.'
'That'll learn him' is incorrect. Of course it should be 'that'll teach him.'
this is a redneck sentence here in the states.
I am so guilty of a lot of these mistakes. That is why we have proof readers for our stories. They pick out our bad stuff and spank it soundly.
Bunker Love
My Dream my latest stopry
Ensure, Ensured
Assure, Assured, Assurance
Insure, IInsured, nsurance
These are not interchangeable!
"Per say" instead of per se (Latin for "in itself")
I also get annoyed at the arbitrary (note, not random) use of the word "random"
Warning: The opinions above are those of an anonymous individual on the internet. They are opinions, unless they're facts. They may be ill-informed, out of touch with reality or just plain stupid. They may contain traces of irony. If reading these opinions causes you to be become outraged or you start displaying the symptoms of outrage, stop reading them immediately. If symptoms persist, consult a psychiatrist.
Why not read some stories instead
NEW! Want a quick read for your coffee break? Why not try this... Flash Erotica: Scrubber Maybe more carelessness than confusion, but I messed up "site" and "sight" in a Lush story ("the site of my wife's bald pussy" or something like that). Caught it on the last read through before posting but that was like the twelfth or so time I'd proofed it and I have no idea how I missed it on the other passes.
I can understand people confusing discrete with discreet. What gets me though, is when you hear people say, 'I brought it for £2.' No you didn't you thick twat! You bought it!!!
I'm probably too critical but that particular one just annoys me, sorry.
Especially for English as a second language people, it can be confusing:
cockhead vs dickhead
pussy vs wussy
fuck it vs Phuket
ain't got no vs I can haz
stick it in vs stick 'em up
head up your ass vs rimming you
going down on you vs sharing the elevator to the lobby
12 inch cock vs reality
You were looking at a different source, then! Because the source of it is still there! If it's somebody I know, I would message them and ask about it. But it's more than one person, and I don't know any of them. 
More writing, less waffle... 
