identify, please!

How worse could a day kick off when the first two orders are: one shot decaf cappuccino and soya cappuccino with cinnamon on top??!!
I always thought that a cappuccino is a cappuccino, a name to identify a specific drink. You just walk in a bar and ask for this drink. When you get it "here's your cappuccino"..... no buts.
Until I came to live here in London.

First of all: decaf is not even coffee. It doesn't wake you up because, well it's decaf; you get it, right?
- ok, you don't need something to boost you up so you just want a coffee-based drink. So, why one shot instead of two?
- you don't want it too strong? why worry? it's decaf!!!!
- you don't like the taste of it? why u drink it then?
- ok, ok, I got it! with two shots you can taste the coffee too much and it's too bitter for you: so why don't you drink a latte that contains more milk?
But, more important who's forcing you to go in a coffee shop and ask 4 your weird drink? social convention maybe? Is it John?