TSHOOT: EIGRP AD & FD PART 3

In Part 2 we have seen the show ip route output as


D    192.168.4.0/24 [90/358400] via 192.168.1.4, 00:45:42, Ethernet0/0
                    [90/358400] via 192.168.1.2, 00:45:42, Ethernet0/0
                    [90/358400] via 192.168.1.1, 00:45:42, Ethernet0/0
D    192.168.5.0/24 [90/486400] via 192.168.1.4, 00:45:42, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:45:42, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:45:42, Ethernet0/0
D    192.168.6.0/24 [90/486400] via 192.168.1.4, 00:45:42, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:45:43, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:45:43, Ethernet0/0
C    192.168.7.0/24 is directly connected, Ethernet0/1
C    192.168.1.0/24 is directly connected, Ethernet0/0
D    192.168.2.0/24 [90/307200] via 192.168.1.4, 01:06:55, Ethernet0/0
                    [90/307200] via 192.168.1.2, 01:06:55, Ethernet0/0
                    [90/307200] via 192.168.1.1, 01:06:55, Ethernet0/0
D    192.168.3.0/24 [90/332800] via 192.168.1.4, 00:45:46, Ethernet0/0
                    [90/332800] via 192.168.1.2, 00:45:46, Ethernet0/0
                    [90/332800] via 192.168.1.1, 00:45:46, Ethernet0/0

But now in this scenario we have the below output

D    192.168.4.0/24 [90/358400] via 192.168.1.4, 00:00:21, Ethernet0/0

                    [90/358400] via 192.168.1.2, 00:00:21, Ethernet0/0

                    [90/358400] via 192.168.1.1, 00:00:21, Ethernet0/0

D    192.168.5.0/24 [90/2713600] via 192.168.7.2, 00:00:21, Ethernet0/1

                    [90/486400] via 192.168.1.4, 00:00:21, Ethernet0/0

                    [90/486400] via 192.168.1.2, 00:00:21, Ethernet0/0

                    [90/486400] via 192.168.1.1, 00:00:21, Ethernet0/0

D    192.168.6.0/24 [90/2713600] via 192.168.7.2, 00:00:22, Ethernet0/1

                    [90/486400] via 192.168.1.4, 00:00:22, Ethernet0/0

                    [90/486400] via 192.168.1.2, 00:00:22, Ethernet0/0

                    [90/486400] via 192.168.1.1, 00:00:22, Ethernet0/0

C    192.168.7.0/24 is directly connected, Ethernet0/1

C    192.168.1.0/24 is directly connected, Ethernet0/0

D    192.168.2.0/24 [90/307200] via 192.168.1.4, 00:00:25, Ethernet0/0

                    [90/307200] via 192.168.1.2, 00:00:25, Ethernet0/0

                    [90/307200] via 192.168.1.1, 00:00:25, Ethernet0/0

D    192.168.3.0/24 [90/332800] via 192.168.1.4, 00:00:25, Ethernet0/0

                    [90/332800] via 192.168.1.2, 00:00:25, Ethernet0/0

                    [90/332800] via 192.168.1.1, 00:00:25, Ethernet0/0

why the above behavior based on the output shown below?

R6#sh run | b eigrp

router eigrp 10

 variance 6

 network 192.168.1.0

 network 192.168.7.0

 no auto-summary

Now the new question is why Variance is 6??