Hi Kristoffer,
When you said planned data loading to Weekly load. My guess is planing cube properties will be the issue.
Some one may changed while entering the planned data and forgot to revert back.
Try to check real time specific settings of your cube.
Info cube --> Planing specific properties-->Change real time load behavior.
Play with below options and later check at LISTCUBE.
Real time data target can be planned, data loading not allowed.
Real time data target can be loaded with data, planing not allowed.
Thanks