Dan,
Which do you think would be worse in the view of an airline recruiter?
Failing a PPL test and passing two days later
Partialing a CPL and passing a retake
Failing an IR test twice and finally getting a third series pass
If you did PPL training in a 4-6 week period, the failure will seem worse than if your training was spread over 6-12 months. I don't think an airline will care at all about this, so long as you avoid the other two scenarios above. It's very early days in your training, so buck up and put it behind you.