It's a glitch in SG's system for detecting how many points to set things at. Whenever something on the Steam store page goes on sale (whether it's the game itself, or a related package), it looks at the highest crossed-out price instead of the one associated with that specific item. Because Daedalic games and packages go on sale so often, and there are usually several different packages per page, the point values for their games here on SG go crazy. Thankfully, point costs are capped at 100 so we won't be seeing any 160 point giveaways for these games soon.