Does this behaviour pose any problem if I want to anonymize bitcoins? I haven't started researching that field of knowledge yet
Yes it can, there are some threads about that.
I hate when programs assumes the users doesn't want to know what's going on "under the hood". Sure, most people don't care and maybe find it confusing, but they could at least put in something like a "show advanced settings and information" checkbox...
I agree so much...