RB750: Unable to get Static IP /WAN to run

I am a newbie and am unable to figure out why my RB750 router will not assign Static IP.
It is defaulting to the default configuration ( 192.168.88.28) instead of 10.16.24.9.
A neighboring router shows :

/ip neighbor> print
INTERFACE ADDRESS MAC-ADDRESS
ether3... 10.16.24.8 DC:xx xx xx xx :4C

ether3... fe80::d6ca:6dff:fe24:74c1 D4:xx xx xx xx :C1
(RB750: In Winbox shows 192.168.88.28 in address field)

ether3... 10.16.24.10 DC:xx xx xx xx :C9

I am stumped. I looked through the forum and saw a similar issue :
**Setting up RB750G for fixed IP wan using web interface?



interface print

ADDRESS NETWORK INTERFACE

0 ;;; default configuration
192.168.88.28/24 192.168.88.0 ether5 - Admin
1 10.18.0.1/26 10.18.0.0 ether3 - Clients
2 10.16.24.9/26 10.16.24.0 ether1- WAN
3 10.255.0.25/32 10.255.0.25 loopback

ip dns print
servers: 10.16.0.1,8.8.8.8
dynamic-servers:
allow-remote-requests: yes
max-udp-packet-size: 512
query-server-timeout: 2s
query-total-timeout: 10s
cache-size: 2048KiB
cache-max-ttl: 1w
cache-used: 10KiB

ip route

DST-ADDRESS PREF-SRC GATEWAY DISTANCE

0 A S 0.0.0.0/0 10.16.24.1 1
1 ADC 10.16.24.0/26 10.16.24.9 ether1- WAN 0
2 ADC 10.18.0.0/26 10.18.0.1 ether3 - Clients 0
3 ADC 10.255.0.25/32 10.255.0.25 loopback 0
4 ADC 192.168.88.0/24 192.168.88.28 ether3 - Clients 0

ip firewall nat> print
0 chain=srcnat action=masquerade out-interface=ether1- WAN log=no log-prefix=""

Still I am unable to solve the issue.

Can anyone shed a light on what is happening?
How do I get the static IP (10.16.24.9) to function on the 750 router?

Thanks in advance.