Running activities which I have recorded with my Forerunner 630 will be transferred to the Edge 530 without any problems. Even though the history on the Edge 530 does not show the training load of this specific running activity, the total of training load (last 7 days) in "My Stats" will be updated accordingly. Perfect! 
But what is not working is the "Load Focus". There are only my bike rides (recorded with Edge 530) and their anaerobic, high aerobic or low aerobic impact. My running activities have no impact on any of these training areas. And therefore the total of training load (in the load focus graph) does not correspond to the total of all the activities (running + bike) in the last 4 weeks.
Does anyone have the same problem?