I am a Juicebox newbie, an amateur webdesigner and a non native english speaker. I hope my question will be clear !

I have created several galleries, with the same configuration options (see below). When I embed the galleries in a php page, everything is fine on a PC, but the display is not satisfactory on an iPhone 6S.
I would like to have the thumbs page automatically displayed (like it is when the gallery is not embedded), but I have a first page with a partial view of the first image and I have to click on "View Gallery", then on the second page I have a full display of the first image and I have to click on the Thumbs Button to get the thumbs.

I edit everything manually, I do not use JuiceBoxBuilder or any other tool (some pages were however originally created by a friend with DreamWeaver)

Can you help ?
Thank you in advance !

- - - - iPhone display, not embedded - - - -

- - - - iPhone display, embedded - - - -
   ->      ->   

Site : https://www.helenehurot.com/
Example of embedded page : https://www.helenehurot.com/encres.php

- - - - config.xml - - - -
<juiceboxgallery
    galleryTitle="Hélène Hurot | Abstraits"
    textColor="CCCCCC"
    thumbFrameColor="FFFFFF"
    thumbSelectedFrameWidth="4"
    galleryTitlePosition="ABOVE_THUMBS"   
    galleryTitleAlign="LEFT"           
    galleryDescription="Tableaux abstraits d'Hélène Hurot, Artiste Peintre"
    imageTransitionType="FADE"   
    imageScaleMode="SCALE"
    imageTransitionTime="1"
    frameWidth="4"
    thumbWidth="80"
    thumbHeight="80"
    thumbsPosition="LEFT"
    maxThumbColumns="3"
    maxThumbRows="5"
    autohideThumbs="YES"
    thumbsPadding="10"
    buttonBarPosition="TOP"
    buttonBarHAlign="RIGHT"
    showOpenButton="FALSE"
    showExpandButton="TRUE"
    useFullscreenExpand="TRUE"
    showThumbsButton="FALSE"
    showAutoPlayButton="TRUE"
    showDownloadButton="FALSE"   
    showNavButtons="TRUE"   
    showEmailButton="TRUE"   
    emailAddress="contact@helenehurot.com"
    emailSubject="CONTACT helenehurot.com | message d'un visiteur"
    captionPosition="BELOW_IMAGE"
    captionHAlign="CENTER"
    captionBackColor="222222"
    captionBackTopColor="222222"
    buttonBarBackColor="222222"
    backButtonPosition="TOP"
    backButtonText=" "
    backButtonUrl="http://www.helenehurot.com/"
    enableAutoPlay="FALSE"
    goNextOnAutoPlay="TRUE"
    displayTime="3"
    enableLooping="FALSE"
    languageList="Montrer les vignettes|Masquer les vignettes|Etendre la galerie|Fermer la galerie|Ouvrir l'image dans une nouvelle fenêtre|Images|Tableau suivant|Tableau précédent|Play Audio|Pause Audio|Show Information|Hide Information|Lancer un diaporama|Arrêter le diaporama|Diaporama ON|Diaporama OFF|Retour arrière|Buy this Image|Share on Facebook|Share on Twitter|Share on Google+|Share on Pinterest|Share on Tumblr|of|Envoyer un message|Download|Password|Incorrect Password.|A propos du tableau|dans la galerie"   
>

- - - - php page- - - -
<!--START JUICEBOX EMBED-->
<script src="galeries/jbcore/juicebox.js"></script>
<script>
  new juicebox({
    baseUrl : 'galeries/abstraits/',
    containerId : 'juicebox-container',
    galleryWidth : '100%',
    galleryHeight : '80%',
    backgroundColor: '#222222'
  });
</script>
<div id="juicebox-container"></div>
<!--END JUICEBOX EMBED-->