Hi - first, sorry about the PFO.
I would say (but I am not graduate recruitment) that indeed it is not your application but the score at the WG as they do a first screening and you got through twice. It could also be the Arctic Shores test as well. When you do WG practice tests, what is your average grade at the WG? 
As a piece of advice, I practised on jobtestprep and it was helpful. There are also a course on TCLA. And if I can share with you a sheet I prepared to understand steps better. But overall, the more you do practice tests, the better you will get at it.
I believe you can get your results, although I do not know 100%. I read on some thread ([USER=2672]@Jessica Booker[/USER] was explaining it) that you can ask to receive your data from a firm, and it will include your test I suppose, so you would get your results.
PS: for precision, on TCLA general discussion " Data Subject Access Request requesting a copy of the personal information associated with your application (This includes a copy of detailed assessment centre and interview observation notes, for you specifically)" is the specific procedure.
Finally, good luck for your TC applications!
