The price development is due to the fact that we work with daily prices. These can change daily. The reason for this is that we do not necessarily have only one supplier for an article, but fall back on several so that the availability is guaranteed as far as possible. Each supplier has different prices. Therefore, it can be that the price is sometimes higher and sometimes lower.
This means that if a bundle was made, it was still included at the original price. As soon as the price of each individual item changes, this does not automatically change in the bundle. Therefore, it can happen that a bundle is sometimes more expensive than the individual items.