We've found the same thing, but we haven't actually had good enough weather for it to be a problem yet! The one time I needed to hold it open I used clothes pegs to fasten it to the sun canopy, I think I'm going to try to find a better way of doing that as it effectively gave us a side wall, but I haven't really played with it yet, sorry.
Hiya. Thats what really bugs me, but thought it was just me. lol. Nothing to pin it back. So what we do is, undo the zips both sides, roll the door up and then take the zips over to the left side and then just let it hang rolled up. But only in the summer. lol
-------------
June - Sandringham Est, King's Lynn
July - Clumber Park, Worksop
I do dimly remember it actually, I think 3 years ago? One of the hamsters died of heatstroke! Of course by the time the kids broke up it was raining again. Still with the little ones sun cream allergy we probably shouldn't be complaining!