I am wondering alot about something and it has not been adressed as far as I have read.
So you're using 4 different, well, IP's (?) you could say per account. I mean the Bluestacks program where you created the account on, Hootsuite and the other two services you use for posting. These programs use different IPs and not only that, doesn't facebook register that it is an automated service that does the posts (they don't use proxies as far as I know and your VPN does not help since said programs are not directly on your PC). Am I overlooking somethinghere?
Why don't your accounts get banned or at least get a verification appeal? As far as I can see facebook should automatically register that the account is being posted from from different locations. Can you please give some information on this?