Definitely contact customer service - it may be a "sale" from partner Conrad, but I personally don't understand it either: https://helpcenter.digitec.ch/hc...

I don't know. I was able to order 1 piece "normally". I would ask the customer service.

This is not the case directly with third-party suppliers. Instead, there is a small-quantity surcharge and postage.

No idea

Probable delivery bottlenecks