Sander Here's my line of thinking: The Joint accounts at bunq are en/of (OR accounts). All the money is owned by everyone that participates in the Joint account. Therefore, 100% should be shown as you own and can use 100% of the money at all times. Of course, the same is true for everyone else that participates in the Joint account, but both legally and technically all owners own all of the money and each person can solely use 100% of it whenever they want.
If you have formed some kind of understanding with the other owners of the Joint account that you're partaking in that the money is somehow supposed to be split up between you, then that's a personal thing you can do of course, but it doesn't reflect the legal or technical reality of the situation. Therefore I would agree with Thijs that this would be quite confusing if shown like that.