fix: routing priorities are not working properly (#472)

Signed-off-by: charlie <qianglin98@qq.com>

test/e2e/conformance/tests/httproute-same-host-and-path.yaml

@@ -102,3 +102,42 @@ spec:
                 name: infra-backend-v2
                 port:
                   number: 8080
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: higress-same-host-and-path-05
+  namespace: higress-conformance-infra
+spec:
+  ingressClassName: higress
+  rules:
+    - http:
+        paths:
+          - pathType: Prefix
+            path: "/"
+            backend:
+              service:
+                name: infra-backend-v1
+                port:
+                  number: 8080
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  annotations:
+    # exact matching
+    higress.io/exact-match-header-abc: "123"
+  name: higress-same-host-and-path-06
+  namespace: higress-conformance-infra
+spec:
+  ingressClassName: higress
+  rules:
+    - http:
+        paths:
+          - pathType: Prefix
+            path: "/"
+            backend:
+              service:
+                name: infra-backend-v2
+                port:
+                  number: 8080