Welcome to the Q&A Forum

Hi Jessica Jesse is correct that your email summary and the website changes are reporting for all 3 search engines by default. If you want to look at the individual search engine changes you can filter your results by selecting Show: My Rankings then next to it compared to competitors (Bing en-US) as an example and you will see the above summary change. Hope this helps!

It's probably natural, as lots of sites have and continue to do this. The problem comes when lots of domains are 301 directed all at once, or there are spammy link pointed to the 301 domains. In the old days, misspellings and exact match parked domains got a fair amount of traffic, so this practice was much more common than it is today. Now, Google is much more sophisticated and these types of domains don't pack much of a punch. On the flip side, you're probably gaining little or no SEO benefit from this either. If you are concerned about it, you might test stopping the redirection for 30 days and see what happens, or change the 301's into 302's, which don't pass PageRank and are therefor considered a little safer in shady situations. Hope this helps. Best of luck with your SEO!