See in picture, the game of the year addition includes like a majority of the stuff below it. Why would I want to buy the game plus spend much extra buying all its parts individually? Yet all those boxes are auto checked. Someone who didn't know better could be screwed by this. And to top it all off, it seems no discount in bundling.

Wait until you purchase the Game of the year edition, only to discover that each piece of individual DLC is still marked as not owned.

This has become pretty common thing. Just check Steam for games that have GOTY or some other complete edition. A lot of them still sell the regular edition, season pass and seperate DLC, despite you can get full package a lot cheaper.

Of course The complete editions come out much later, but it still can be a bit confusing later on for new buyers.

Steam is not bundling complete editions with regular editions during sales and DLC's are always marked as "owned" if you own them on Valve's store.
GOG is just deliberately confusing the customers.

Never attribute to malice that which is adequately explained by stupidity. Unless you have proof of malice, that is.

How about this? Never just click "OK" on a bundle like that without first seeing what's in it? Having multiple variants of a game show up selected like that has been that way for years. I'm sure complaint threads like this have shown up in the past as well, to be buried under the weight of the general forum.

It's not really a "bundle" though since you're not saving anything by buying them together.

Instead it's a trap. Whether accidental/buggy or intentional doesn't change that it's a trap. And it's GoG's responsibility to not have friggin traps! I

GoG should not make it easy for people to mess up on their order, period. They should remove this type of page system/traps till they get it right. it's not like the page serves any other purchase than making it too easy to fall into a trap and buy wrong. No customers are going to miss it!

I wonder if they'd give a refund if someone fell into that trap or how the order would even go since you theoretically can't own more than one copy of a game but that would be owning more than one copy if the trap purchase went through as stated.

Speaking of refunds, I had a game I was having trouble getting to run on my system. They offered me gift credit instead of a refund. Does GoG not offer proper full refund, like your money back?