Sweetpea seedlings

[Allthegoodnamestakken]

So I planted some sweetpea seeds a couple of weeks ago (not in the UK, its the correct time here)
This is the second half of the seed packet and last year's where lovely. However I seem to have one odd seedling. Can anyone confirm if it's just an odd looking sweetpea or if I've got a mixed up seed before I transplant them.
Single plant picture is the odd one, all the others look the same (second picture)

Looks like a sunflower to me, did you also have sunflowers?

Oh sorry, read your post wrong, it's the 2nd photo I can see a sunflower seedling in, at the back.

Oh goodness you're right that one with the pink stem is a sunflower. God knows how that got their but I grow a lot of sunflowers so not to much of a surprise. Its the individual one I'm really confused by