diff --git a/README.md b/README.md
index 7f04c6c..152a912 100644
--- a/README.md
+++ b/README.md
@@ -65,9 +65,16 @@ $ gpodder2go serve --no-auth
 
 Alternatively, you can switch to use [Antennapod](https://antennapod.org/) which has implemented the login spec which gpodder2go currently supports.
 
-### Supports
+### Supported Clients
 
-- [Antennapod](https://antennapod.org/)
+#### [Antennapod](https://antennapod.org/)
+
+These features are all working with Antennapod:
+    - Authentication API
+    - Subscriptions API
+    - Episode Actions API
+    - Device API
+    - Device Synchronization API
 
 ### Development
 
diff --git a/go.mod b/go.mod
index 3c12660..017e5c9 100644
--- a/go.mod
+++ b/go.mod
@@ -14,7 +14,6 @@ require (
 	github.com/spf13/cobra v1.4.0
 	k8s.io/utils v0.0.0-20210930125809-cb0fa318a74b
 	modernc.org/sqlite v1.26.0
-	github.com/relvacode/iso8601 v1.3.0
 )
 
 require (
diff --git a/go.sum b/go.sum
index f0f9292..9bcf121 100644
--- a/go.sum
+++ b/go.sum
@@ -971,8 +971,6 @@ github.com/prometheus/procfs v0.2.0/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4O
 github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 github.com/prometheus/procfs v0.7.3/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
-github.com/relvacode/iso8601 v1.3.0 h1:HguUjsGpIMh/zsTczGN3DVJFxTU/GX+MMmzcKoMO7ko=
-github.com/relvacode/iso8601 v1.3.0/go.mod h1:FlNp+jz+TXpyRqgmM7tnzHHzBnz776kmAH2h3sZCn0I=
 github.com/remyoudompheng/bigfft v0.0.0-20190728182440-6a916e37a237/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
diff --git a/pkg/data/sqlite.go b/pkg/data/sqlite.go
index f7126df..e78217a 100644
--- a/pkg/data/sqlite.go
+++ b/pkg/data/sqlite.go
@@ -140,17 +140,11 @@ func (s *SQLite) RetrieveDevices(username string) ([]Device, error) {
 
 func (l *SQLite) AddEpisodeActionHistory(username string, e EpisodeAction) error {
 	db := l.db
-	tx, err := db.Begin()
-	if err != nil {
-		return err
-	}
 
-	_, err = tx.Exec("INSERT INTO episode_actions(device_id, podcast, episode, action, position, started, total, timestamp) VALUES (?,?,?,?,?,?,?,?)", e.Device, e.Podcast, e.Episode, e.Action, e.Position, e.Started, e.Total, e.Timestamp.Unix())
+	_, err := db.Exec("INSERT INTO episode_actions(device_id, podcast, episode, action, position, started, total, timestamp) VALUES (?,?,?,?,?,?,?,?)", e.Device, e.Podcast, e.Episode, e.Action, e.Position, e.Started, e.Total, e.Timestamp.Unix())
 	if err != nil {
-		tx.Rollback()
 		return err
 	}
-	tx.Commit()
 	return nil
 }
 
@@ -161,14 +155,8 @@ func (l *SQLite) RetrieveEpisodeActionHistory(username string, deviceId string,
 
 	query := "SELECT a.podcast, a.episode, a.device_id, a.action, a.position, a.started, a.total, a.timestamp"
 	query = query + " FROM episode_actions as a, devices as d, users as u"
-	query = query + " WHERE a.device_id = d.name AND d.user_id = u.id AND u.username = ?"
-	var args []interface{}
-	args = append(args, username)
-	if !since.IsZero() {
-		query = query + " AND a.timestamp > ?"
-		args = append(args, since)
-	}
-	query = query + " ORDER BY a.id"
+	query = query + " WHERE a.device_id = d.name AND d.user_id = u.id AND u.username = ? ORDER BY a.id"
+	args := []interface{}{username}
 	rows, err := db.Query(query, args...)
 	if err != nil {
 		return nil, err
@@ -200,8 +188,20 @@ func (l *SQLite) RetrieveEpisodeActionHistory(username string, deviceId string,
 		timestamp.Time = time.Unix(g, 0)
 		a.Timestamp = timestamp
 
-		actions = append(actions, a)
+		// For some reason, the timestamp for episode actions has been stored as
+		// an integer, but in a field of type varchar(255). (that's why you see
+		// the ParseInt call above). So we cannot use a DB query to sort or
+		// filter by timestamp, because the DB would sort the integers
+		// alphabetically. Someone should probably fix that by making a
+		// migration to change the timestamp type in the DB, and then let the DB
+		// handle the filtering.
+		if !since.IsZero() {
+			if a.Timestamp.Before(since) {
+				continue
+			}
+		}
 
+		actions = append(actions, a)
 	}
 
 	return actions, nil
diff --git a/pkg/data/types.go b/pkg/data/types.go
index 394456c..19e686a 100644
--- a/pkg/data/types.go
+++ b/pkg/data/types.go
@@ -38,7 +38,7 @@ type Subscription struct {
 	Devices   []int           `json:"devices"`
 	Podcast   string          `json:"podcast"`
 	Action    string          `json:"action"`
-	Timestamp CustomTimestamp `json:"timestamp"`
+	Timestamp CustomTimestamp `json:"timestamp"` // sqlite stores this as a varchar(255)
 }
 
 type Device struct {