not to say that Sandboxie is incompatible with Comodo sandbox. (well known fact on both Comodo and sandboxie forums)
You can see that the tray icon of Sbie doesnt keep the red dots (meaning no sandboxing is applied).
i sufffered this bug when i installed CIS and Sbie, Sbie couldn't protect my browser; in fact it even didn't start at all.
i didn't pay attention that both was running when i wrote my post earlier. it is by reading
@Av Gurus' comment that i saw the issue.
so basically the test is irrelevant for checking Sbie protection. Sbie should have been tested alone with proper settings.