diff --git a/src/apps.js b/src/apps.js
index 3a0dfd8c7..05d353466 100644
--- a/src/apps.js
+++ b/src/apps.js
@@ -272,7 +272,8 @@ function translatePortBindings(portBindings, manifest) {
 
     for (let portName in portBindings) {
         const portType = portName in tcpPorts ? exports.PORT_TYPE_TCP : exports.PORT_TYPE_UDP;
-        result[portName] = { hostPort: portBindings[portName], type: portType, portCount: portBindings[portName].portCount || 1 };
+        const portCount = portBindings[portName].portCount || (portName in tcpPorts ? manifest.tcpPorts[portName].portCount : manifest.udpPorts[portName].portCount);
+        result[portName] = { hostPort: portBindings[portName], type: portType, portCount: portCount || 1 };
     }
 
     return result;
@@ -1286,7 +1287,7 @@ async function install(data, auditSource) {
 
     const subdomain = data.subdomain.toLowerCase(),
         domain = data.domain.toLowerCase(),
-        portBindings = translatePortBindings(data.portBindings || null, manifest),
+        portBindings = translatePortBindings(data.portBindings || null, data.manifest),
         accessRestriction = data.accessRestriction || null,
         memoryLimit = data.memoryLimit || 0,
         debugMode = data.debugMode || null,
@@ -2256,7 +2257,7 @@ async function clone(app, data, user, auditSource) {
 
     const subdomain = data.subdomain.toLowerCase(),
         domain = data.domain.toLowerCase(),
-        portBindings = translatePortBindings(data.portBindings, manifest),
+        portBindings = data.portBindings || null,
         backupId = data.backupId,
         overwriteDns = 'overwriteDns' in data ? data.overwriteDns : false,
         skipDnsSetup = 'skipDnsSetup' in data ? data.skipDnsSetup : false,
@@ -2275,6 +2276,8 @@ async function clone(app, data, user, auditSource) {
 
     const manifest = backupInfo.manifest, appStoreId = app.appStoreId;
 
+    const newPortBindings = translatePortBindings(data.portBindings, manifest);
+
     let error = validateSecondaryDomains(data.secondaryDomains || {}, manifest);
     if (error) throw error;
     const secondaryDomains = translateSecondaryDomains(data.secondaryDomains || {});
@@ -2289,7 +2292,7 @@ async function clone(app, data, user, auditSource) {
     error = checkManifestConstraints(manifest);
     if (error) throw error;
 
-    error = validatePortBindings(portBindings, manifest);
+    error = validatePortBindings(newPortBindings, manifest);
     if (error) throw error;
 
     // should we copy the original app's mailbox settings instead?
@@ -2324,8 +2327,8 @@ async function clone(app, data, user, auditSource) {
         mailboxDisplayName: app.mailboxDisplayName
     };
 
-    const [addError] = await safe(add(newAppId, appStoreId, manifest, subdomain, domain, portBindings, obj));
-    if (addError && addError.reason === BoxError.ALREADY_EXISTS) throw getDuplicateErrorDetails(addError.message, locations, portBindings);
+    const [addError] = await safe(add(newAppId, appStoreId, manifest, subdomain, domain, newPortBindings, obj));
+    if (addError && addError.reason === BoxError.ALREADY_EXISTS) throw getDuplicateErrorDetails(addError.message, locations, newPortBindings);
     if (addError) throw addError;
 
     await purchaseApp({ appId: newAppId, appstoreId: app.appStoreId, manifestId: manifest.id || 'customapp' });