301`s passing through a Transportr url before going to correct url

I have been doing a bunch of work for a client moving sites over to Shopify... so when I saw your plugin I was relieved as creating thousands of 301's manually was not something I wanted to do. However I only just discovered that the 301`s do a redirect through a transportr url first and then onto the correct url... my worry is that search engines only pass page rankings and other relevant data through a single redirection hop. Using unnecessary redirects can have a negative impact on page ranking.
So with it 301 redirecting to a transportr url first and then onto the correct url I am worried what we could lose everything!!