Multiples ip address on interface. The wrong one is used for output. What is wrong?

Multiples ip address on interface. The wrong one is used for output. What
is wrong?

I ran curl on curlmyip.com, and I got the wrong output ip address. My
systemd service file is:
[Unit]
Description=Wired Networking
Wants=network.target dibbler-client.service
Before=network.target dibbler-client.service
[Service]
Type=oneshot
RemainAfterExit=yes
EnvironmentFile=/etc/conf.d/network
ExecStart=/sbin/ip link set dev ${interface} up
ExecStart=/sbin/ip addr add ${address}/24 dev ${interface}
ExecStart=/sbin/ip addr add ${failover}/32 dev ${interface}
ExecStart=/sbin/ip route add default via ${gateway} src ${failover}
ExecStart=/sbin/ip -6 addr add ${addressv6}/64 dev ${interface}
ExecStop=/sbin/ip addr flush dev ${interface}
ExecStop=/sbin/ip -6 addr flush dev ${interface}
ExecStop=/sbin/ip link set dev ${interface} down
[Install]
WantedBy=multi-user.target
And variables are:
interface=eno1
address=88.190.15.135
address6=2001:bc8:300a:dead::b12d
failover=212.83.129.104
broadcast=88.190.15.255
gateway=88.190.15.1
Now, ip addr give me:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc mq state
UP qlen 1000
link/ether b8:ac:6f:94:e2:4e brd ff:ff:ff:ff:ff:ff
inet 88.190.15.135/24 scope global eno1
valid_lft forever preferred_lft forever
inet 212.83.129.104/32 scope global eno1
valid_lft forever preferred_lft forever
inet6 2001:bc8:300a:dead::b12d/64 scope global
valid_lft forever preferred_lft forever
inet6 2a01:e0b:1000:15:baac:6fff:fe94:e24e/64 scope global dynamic
valid_lft 2591996sec preferred_lft 604796sec
inet6 fe80::baac:6fff:fe94:e24e/64 scope link
valid_lft forever preferred_lft forever
3: eno2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
link/ether b8:ac:6f:94:e2:4f brd ff:ff:ff:ff:ff:ff
8: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast state UNKNOWN qlen 100
link/none
inet 10.8.0.1/24 brd 10.8.0.255 scope global tun0
valid_lft forever preferred_lft forever
and ip route:
default via 88.190.15.1 dev eno1 src 212.83.129.104
10.8.0.0/24 dev tun0 proto kernel scope link src 10.8.0.1
88.190.15.0/24 dev eno1 proto kernel scope link src 88.190.15.135
How can curlmyip.com tell me that I reach it with 88.190.15.135?
Thanks!