diff --git a/VERSION b/VERSION
index 2c2a151..1b386a5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.17.5
+6.18.0
diff --git a/play-life-web/package.json b/play-life-web/package.json
index f6423fd..cf827ee 100644
--- a/play-life-web/package.json
+++ b/play-life-web/package.json
@@ -1,6 +1,6 @@
 {
   "name": "play-life-web",
-  "version": "6.17.5",
+  "version": "6.18.0",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/play-life-web/src/components/ShoppingItemDetail.jsx b/play-life-web/src/components/ShoppingItemDetail.jsx
index f0f7fea..8d1dd9d 100644
--- a/play-life-web/src/components/ShoppingItemDetail.jsx
+++ b/play-life-web/src/components/ShoppingItemDetail.jsx
@@ -196,7 +196,8 @@ function ShoppingItemDetail({ itemId, onClose, onRefresh, onItemCompleted, onNav
                       type="button"
                       className="progression-control-btn progression-control-plus"
                       onClick={() => {
-                        const current = parseFloat(volumeValue) || 0
+                        const base = item.last_volume ?? item.volume_base ?? 1
+                        const current = volumeValue.trim() ? parseFloat(volumeValue) : base
                         const step = item.volume_base || 1
                         setVolumeValue((current + step).toString())
                       }}
diff --git a/play-life-web/src/components/TaskDetail.css b/play-life-web/src/components/TaskDetail.css
index ce5ceda..7234619 100644
--- a/play-life-web/src/components/TaskDetail.css
+++ b/play-life-web/src/components/TaskDetail.css
@@ -218,6 +218,10 @@
   flex: 1;
 }
 
+.shopping-item-complete-row .progression-label {
+  margin-bottom: 0;
+}
+
 .shopping-item-complete-row + .task-action-left {
   margin-top: 0.75rem;
 }
diff --git a/play-life-web/src/components/TaskDetail.jsx b/play-life-web/src/components/TaskDetail.jsx
index da9ca7c..552e4e4 100644
--- a/play-life-web/src/components/TaskDetail.jsx
+++ b/play-life-web/src/components/TaskDetail.jsx
@@ -840,7 +840,8 @@ function TaskDetail({ taskId, onClose, onRefresh, onTaskCompleted, onNavigate })
                         type="button"
                         className="progression-control-btn progression-control-plus"
                         onClick={() => {
-                          const current = parseFloat(progressionValue) || 0
+                          const base = task.progression_base ?? 1
+                          const current = progressionValue.trim() ? parseFloat(progressionValue) : base
                           const step = task.progression_base || 1
                           setProgressionValue((current + step).toString())
                         }}