For by-object printing sequence, because A1 mini has bigger clearance than P1S, so we blocked this compatiblity to avoid slicing error when printing from Bambu Handy (although it rarely happen and will not cause real printing failure).
The cloud service will not do auto-arrangement for a place. The auto-arrangement feature may generate splite one print plate into two and its arrangement algorithm may change on different versions of cloud slicer.