diff --git a/apps/web/src/lib/service-address.test.ts b/apps/web/src/lib/service-address.test.ts
index 0e6dec3..aee6c50 100644
--- a/apps/web/src/lib/service-address.test.ts
+++ b/apps/web/src/lib/service-address.test.ts
@@ -84,6 +84,21 @@ describe('hydrateAddressBlock', () => {
     expect(state.preservedBindings[0]?.fqdn).toBe('edge.example.com')
   })
 
+  it('при одном IP пула отделяет второй A в extraFqdn узла', () => {
+    const drafts = [
+      aRecord('dns.shnt.top', ['130.49.213.176']),
+      aRecord('ndns.shnt.top', ['130.49.213.176']),
+    ]
+
+    const state = hydrateAddressBlock(drafts, ['130.49.213.176'])
+
+    expect(state.commonFqdns).toEqual(['dns.shnt.top'])
+    expect(state.nodes).toEqual([
+      { ip: '130.49.213.176', extraFqdn: 'ndns.shnt.top' },
+    ])
+    expect(state.preservedBindings).toEqual([])
+  })
+
   it('поднимает веса и приоритеты с общего FQDN', () => {
     const drafts = [
       aRecord('gt.rkns.top', ['130.49.213.153', '93.115.203.183'], {
@@ -143,6 +158,24 @@ describe('toDomainsPayload', () => {
     expect(second.nodes).toEqual(first.nodes)
     expect(second.preservedBindings).toEqual([])
   })
+
+  it('круг hydrate → payload → hydrate сохраняет extra FQDN при одном IP', () => {
+    const drafts = [
+      aRecord('dns.shnt.top', ['130.49.213.176']),
+      aRecord('ndns.shnt.top', ['130.49.213.176']),
+    ]
+    const first = hydrateAddressBlock(drafts, ['130.49.213.176'])
+    expect(first.commonFqdns).toEqual(['dns.shnt.top'])
+    expect(first.nodes).toEqual([
+      { ip: '130.49.213.176', extraFqdn: 'ndns.shnt.top' },
+    ])
+    const rebound = toAddressBindings(first, primaryMeta)
+    const second = hydrateAddressBlock(rebound, ['130.49.213.176'])
+
+    expect(second.commonFqdns).toEqual(first.commonFqdns)
+    expect(second.nodes).toEqual(first.nodes)
+    expect(second.preservedBindings).toEqual([])
+  })
 })
 
 describe('removeAddressNode', () => {
diff --git a/apps/web/src/lib/service-address.ts b/apps/web/src/lib/service-address.ts
index 1689400..9fdc6cf 100644
--- a/apps/web/src/lib/service-address.ts
+++ b/apps/web/src/lib/service-address.ts
@@ -145,6 +145,23 @@ function isFullPoolA(draft: ServiceBindingDraft, pool: string[]): boolean {
   return draft.record_type === 'A' && sameIpSet(draft.target_ips, pool)
 }
 
+function takeAsCommon(
+  draft: ServiceBindingDraft,
+  fqdn: string,
+  commonFqdns: string[],
+  weights: Record<string, number>,
+  priorities: Record<string, number>,
+): { weights: Record<string, number>; priorities: Record<string, number> } {
+  if (fqdn) commonFqdns.push(draft.fqdn)
+  if (Object.keys(weights).length === 0) {
+    return {
+      weights: { ...draft.target_ip_weights },
+      priorities: { ...draft.target_ip_priorities },
+    }
+  }
+  return { weights, priorities }
+}
+
 export function hydrateAddressBlock(
   drafts: ServiceBindingDraft[],
   pool: string[] = [],
@@ -166,15 +183,36 @@ export function hydrateAddressBlock(
   const preservedBindings: ServiceBindingDraft[] = []
   let weights: Record<string, number> = {}
   let priorities: Record<string, number> = {}
+  const splitSinglePool =
+    ips.length === 1 &&
+    drafts.filter((draft) => isFullPoolA(draft, ips)).length > 1
+  let assignedFirstSinglePoolCommon = false
 
   for (const draft of drafts) {
     const fqdn = draft.fqdn.trim()
-    if (isFullPoolA(draft, ips)) {
-      if (fqdn) commonFqdns.push(draft.fqdn)
-      if (Object.keys(weights).length === 0) {
-        weights = { ...draft.target_ip_weights }
-        priorities = { ...draft.target_ip_priorities }
+    if (splitSinglePool && isFullPoolA(draft, ips)) {
+      if (!assignedFirstSinglePoolCommon) {
+        assignedFirstSinglePoolCommon = true
+        const next = takeAsCommon(draft, fqdn, commonFqdns, weights, priorities)
+        weights = next.weights
+        priorities = next.priorities
+        continue
       }
+      const ip = draft.target_ips[0]?.trim() ?? ''
+      if (ip && poolSet.has(ip) && fqdn && !claimed.has(ip)) {
+        claimed.add(ip)
+        extraByIp.set(ip, draft.fqdn)
+        continue
+      }
+      const overflow = takeAsCommon(draft, fqdn, commonFqdns, weights, priorities)
+      weights = overflow.weights
+      priorities = overflow.priorities
+      continue
+    }
+    if (isFullPoolA(draft, ips)) {
+      const next = takeAsCommon(draft, fqdn, commonFqdns, weights, priorities)
+      weights = next.weights
+      priorities = next.priorities
       continue
     }
     if (draft.record_type === 'A' && draft.target_ips.length === 1) {