When I look at my face-down Prize cards with Poipole's "Eye Opener" attack, do I have to put them back in the same order?
Yes, you only get to look at them, you don't get to rearrange them.
Source: Lost Thunder FAQ (2018-10-20), TPCi Rules Team (2018-11-01)

Relevant cards

Note: All applicable cards may not be listed below.
SM8_107