Why do dictionaries have three symbols for the same vowel?

Vekin,you are not welcome to post here anymore.
Please keep your fucking mouth shut in future.

Those "Fre's" with the profanity in their posts are not me.

You can tell it's not me, because I would never write "in future". It's "in the future".

Thats because I am not a native speaker and am incapable of replicating normal speech.

No, the fake me is not a native speaker. I am.

And yet you dont recognize 'in future' as pretty standard speech?
B.O.L.L.O.C.K.S.

Not where I'm from. No one says "in future". It may be standard in other parts of the English speaking world, but not here.

I take it you live in complete isolation without access to books, films, or any form of media then.