I don't know what you mean about "the more barrelled shape". The jibs would be rectangular and symmetrical, and upside down wouldn't matter, except that there is a small batten rise, so that means they are slightly rhombic and there is a right/wrong way up, which obviously does matter. Because the batten rise is relatively small on that sail, it is surprisingly difficult to tell which way up they are after making the jibs, which is why it is important to mark them at the time each one is made, before assembly of the sail.
It does look as though they are upside down, but I am not totally convinced, puzzled because in my case you can see that crease is along the other diagonal compared with your creased ones. I can't think of any other explanation, but if you say you did mark them, then don't start pulling things apart straight away.
One of those main panels doesn't look right either, but that might be because it might be positioned incorrectly on one of its battens (fore and aft), or perhaps your parrel downhaul arrangements need altering (fore and aft) in case they are pulling a batten forward or aft. Small changes in the attachment of those parrel downhauls can make quite a difference, I found. (Also two of the battens are caught up around the wrong side of the starboard aft "topping lift", that's not helping matters either. Those aft lifts should be attached just forward enough on the sail catcher that battens can't get on the wrong side.)
To begin with, I suggest try adjusting the position of the jibs and the mains, fore and aft along the battens - and the positioning of the parrel downhauls, - small amounts could make quite a difference - and see if you can tune out any diagonal creases in the main panels. If you can get the main panels setting nicely and any of the jibs persist in showing a permanent diagonal crease, then you would have to consider that it might be upside down.
I think it is possible that at least two of them are upside down, by the look of those creases, but try adjusting their position along the batten before doing anything drastic.
If you are lucky the entire four jibs might prove to be be upside down and if that were the case you could flip the set of four all at once.
It's a bit hard to know where to start. If you can't tune out each of those creases, I suggest flip all or any jibs which have a persistant severe crease, hopefully all four at once if they are all creased, then reassemble the sail. Then hoist it, and adjust the parrel downhaul attachment points and see if you can tune the sail so that you get nice semicircular wringles in the sagging main panels, rather than a diagonal crease. You can expect to be fooling around for a while until it all sets nicely, but once you get it set up right there should be no further problem when you hoist the sail.
With my small Amiina sail, I found no need for any other running control lines than the parrel downhauls, once things were tuned up properly - but it is possible with your somewhat heavier rig that you might need other parrels to make it sit correctly - a throat hauling parrel perhaps - hopefully not, I don't know much about any of those other types of parrel so can't advise.
Slieve or others might have some better advice.
Don't despair - you'll get it right after a bit of messing around, and then you will come to like that sail very much.