[English is not my native language]
It's already more than 4 years Dota 2 has been launched.
I never see the developer fix this yet.

Screenshot :
https://imgur.com/AE2Yer1

Hotkey on display :
[Q key + ... key]
1 = Town Portal
2 = Clarity
3 = FFire
4 = Smoke..? (this is confusing because the position of 4 is between smoke and observer ward)
5 = obs or sentry?
6 = mango?
7 = salve?
8 = tango?

this is confusing. I hope developer fix this asap