Ann: BTX 1503 Acne Phase 2 Study Results Presentation, page-349

From the Interview a few points which are not Verbatim

Vince says potentially something may have gone wrong in the vehicle arm in the USA (12 minutes in)
Then when asked if the trial was stuffed up, he says it was a very well executed trial.
Asked If the vehicle without the drug and the vehicle with the drug give approx the same result, then that is a problem? he says yes
Then asked , it therefore shows the drug does not work?He says - No, it's exactly the opposite of that because the efficacy result in the Aus and USA results were similar, it indicates success in the result.
Asked why he thinks it is a success, he says he thinks with the 11 batches they ran, potentially something happened in manafacturing.

He does say potentially and obviously has to be careful with what he says at this stage.

Considering the USA Vehicle showed evidence similar to the product under trial , wouldn't the authorities, or the ASX force BOT to state what was actually in the respective vehicle?
Are samples of the product under test and the vehicle used for comparison kept upon completion of the trial for scenarios such as this?