AKS Ingress is not routing properly - nginx

Question

I have 2 websites. Each of the site has their corresponding subdomain. To achieve this in AKS, I'm using nginx-ingress to route the traffic according to incoming subdomain.
testing-web1 - http://web1.testing.com/
testing-web2 - http://web2.testing.com/
testing-web1 - by IP address (for testing purpose)
When I enter http://web1.testing.com/, nginx-ingress is routing me to testing-web1. If I enter http://web2.testing.com/, nginx-ingress will route me to testing-web1 instead of testing-web2.
Is this an expected behavior? Did I miss-configure something? I think I'm almost there, but I couldn't figure out what went wrong.
Thanks.
apiVersion: apps/v1
kind: Deployment
metadata:
name: testing-web1
spec:
replicas: 1
selector:
matchLabels:
app: testing-web1
minReadySeconds: 5
template:
metadata:
labels:
app: testing-web1
spec:
nodeSelector:
"beta.kubernetes.io/os": linux
containers:
- name: testing-web1
image: image-web1:1.0
ports:
- containerPort: 80
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: testing-web2
spec:
replicas: 1
selector:
matchLabels:
app: testing-web2
minReadySeconds: 5
template:
metadata:
labels:
app: testing-web2
spec:
nodeSelector:
"beta.kubernetes.io/os": linux
containers:
- name: testing-web2
image: image-web2:1.0
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: testing-web1
labels:
app: testing-web1
spec:
ports:
- port: 80
selector:
app: testing-web1
---
apiVersion: v1
kind: Service
metadata:
name: testing-web2
labels:
app: testing-web2
spec:
ports:
- port: 80
selector:
app: testing-web2
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: webapp-ingress
annotations:
kubernetes.io/ingress.class: nginx
certmanager.k8s.io/cluster-issuer: letsencrypt-staging
nginx.ingress.kubernetes.io/rewrite-target: /
spec:
tls:
- hosts:
- web1.testing.com
- web2.testing.com
rules:
- host: web1.testing.com
http:
paths:
- path: /
backend:
serviceName: testing-web1
servicePort: 80
- host: web2.testing.com
http:
paths:
- path: /
backend:
serviceName: testing-web2
servicePort: 80
- http:
paths:
- backend:
serviceName: testing-web1
servicePort: 80
path: /