diff --git a/pylib/anki/schedv2.py b/pylib/anki/schedv2.py
index fc7c94eaa..12bc58277 100644
--- a/pylib/anki/schedv2.py
+++ b/pylib/anki/schedv2.py
@@ -200,7 +200,7 @@ order by due"""
         cur = self.col.decks.current()
         parents = self.col.decks.parents(cur["id"])
         children = [
-            self.col.decks.get(did) for did in self.col.decks.child_ids(cur["id"])
+            self.col.decks.get(did) for did in self.col.decks.child_ids(cur["name"])
         ]
         for g in [cur] + parents + children:
             self._update_stats(g, "new", -new)
diff --git a/rslib/src/decks/schema11.rs b/rslib/src/decks/schema11.rs
index c7616d35d..ea55fb743 100644
--- a/rslib/src/decks/schema11.rs
+++ b/rslib/src/decks/schema11.rs
@@ -261,8 +261,9 @@ impl From<&DeckCommonSchema11> for DeckCommon {
         // since we're combining the day values into a single value,
         // any items from an earlier day need to be reset
         let mut today = common.today.clone();
-        // time is always updated, so will always be the latest
-        let max_day = today.time.day;
+        // study will always update 'time', but custom study may only update
+        // 'rev' or 'new'
+        let max_day = today.time.day.max(today.new.day).max(today.rev.day);
         if today.lrn.day != max_day {
             today.lrn.amount = 0;
         }