That's right. A failed test for an ab-initio program does not exclude the applicant from any Ready Entry - test which is done after a self sponsored flight training.
But a failed DLR test for the ab-initio program by Condor does actually exclude you from the DLR test for Lufthansas ab-initio program for example, it's different if you do it the other way round. I could imagine that it's similar for the Ready Entry tests, it's basically airline specific. So it's clever to look how the different airlines that hire with the DLR test handle that and to then choose the order of your applications wisely.