StroomQL field name/use consistent behaviour?

[stroomdev10]

Consider this StroomQL

from "Meta Store"

filter Fd = 'S*'

sort by Fd

select Feed as Fd

Why does this not sort on Fd/Feed, but the following does

from "Meta Store"

filter Fd = 'S*'

sort by Feed

select Feed as Fd

I'm guessing you'll say that sort is a Query based action and filter is a Table based action but it feels inconsistent.

to make it consistent I need to do the following

from "Meta Store"

eval Fd=Feed

filter Fd = 'S*'

sort by Fd

select Fd