[tedster]

If you adjust the price of a bid for a combinator card, it will instead set this as your bid for the non-combinator version of the card. This will often result in you immediately and inintentionally purchasing the non-combinator card for a high price without any sort of confirmation button.

Current solution: Don't ever adjust your bids for combinator cards. Cancel them and set a new bid. Not sure there's anything I can/you can do to recover PP lost in this way.