As a follow-up of this question, I'm proceeding with the application for a "Temporary activity visa (subclass 408)", in order to stay in Australia for circa six months from October 2017 to March 2018.
However, I recently have been accepted to present a paper to a conference that will be held in Australia as well, from 19th to 24th of August. Since I'm an Italian citizen, I applied for an "eVisitor (subclass 651)".
The question is the following: will having an eVisitor for the August trip impact in any way the application for the "Temporary activity" visa that I'm requesting for the october-march visit?