Perhaps so it seems from your side (user level) but on system level (kernel level) AV drivers are indeed loaded and very still active.
Old-known rule: Two different AV must not be running on one system. When you open AV GUI, there is perhaps all green and shiny (giving a sense of security), but in the back of their engines (so to speak) they are everything just not right as it should.
Also, there is the greater chance for malware to pass through next to two active AV fighting each other.