That's exactly how mine have looked for a while now. For at least a couple of months at a guess.
I thought the same as you, there is nowhere to see the exact date sent.
But I noticed on a purchase last week that just after I bought it, the older format was showing, but now it has reverted to the new look.
You can still see some details though. When you go into the section labelled purchase history, click on the actual ad title. In your case on the bit in blue that says LED strip light kit etc.
It should open the ad, although that is likely to be their current ad, you'll need to click on the little purple thing that says view order details just above the ad.
That will open a page that will show you exactly what day you bought it & what day you paid for it.
There is also a little tab there you can click on which will show exact postage details.
It's a bit of a rigmarole I know, but at least the details can still be accessed.
