PS CC issues....

Also look to see if any of the layers are locked or linked to layers outside the layers you want to select.  Try selecting the layers and making it a Smart Object.  Then drag the Smart Object to the Library panel.  The watermark will then be available from the Library for all projects going forward.  I love CC Libraries for that reason.

I would suggest a different approach.  Create your watermark as a large document. A Canvas size that is many pixel wide and high. Use as many layers as you want and save it as a PSD file you can make modification in the future.  However also save is as a large png file with a transparent background.  Use this png file to watermark your images.  The PNG will not be a very large files and it can be placed into your image documents and be sized and position via the place transform for the image.   A single smart object layer the can repositioned and resized.  All your watermark's pixels are in the object it will always resize well.   I have posted a script that you can use to automate that process.  You can even record using the script in an action and add a layer style to the layer.  The action can be batch. The Watermark will be sized for the document for which it is place into.

Here is the script change line 3 through 6 to customize it for your use.

#target photoshop;  
app.bringToFront();  
var logoFile = "~/Desktop/JJMack.png"; // Watermark file should be large for resize down works better than up
var LogoSize = 10; // percent of document height to resize Watermark to
var LogoMargin = 1;   // percent of Document height the Watermark should have as a margin
var BottomLetf = false; // false = Bottom Right true Bottom Left 
placeWatermark(logoFile, LogoSize, LogoMargin);    // Place Watermark  into the bottom of the document
function placeWatermark(Image,Size,Margin){  
   if(!documents.length) return;   // if no document return
   try{  
      var doc = app.activeDocument; // set Doc object to active document
      app.displayDialogs = DialogModes.NO; // Dialog off 
      var strtRulerUnits = app.preferences.rulerUnits; // Save Users ruler units 
      var strtTypeUnits = app.preferences.typeUnits; // Save Users Type units 
      app.preferences.rulerUnits = Units.PIXELS; // work with pixels 
      app.preferences.typeUnits = TypeUnits.PIXELS; // work with pixels 
      var fileObj = new File(Image);                 // the passed file
      if(!fileObj.exists){   // If file does not exits tell user 
         alert(fileObj.name  + " does not exist!");  
         return;  
      }  
      placeFile(fileObj); // Place in file the Watermark png file
      activeDocument.activeLayer.resize(100 ,100,AnchorPosition.MIDDLECENTER); // Insure Place did not scale layer  
      var SB = activeDocument.activeLayer.bounds; // get layers bounds 
      var layerHeight = SB[3] - SB[1]; // get layers height  
      var resizePercent = (100/layerHeight)*(Size/100*doc.height.value); // Percent to resize by 
      activeDocument.activeLayer.resize(resizePercent ,resizePercent,AnchorPosition.MIDDLECENTER);  // Resize width and height by percentage 
      SB = activeDocument.activeLayer.bounds; // get resized layers bounds  
      activeDocument.activeLayer.translate(-SB[0].value,-SB[1].value); // Move resized layer to top left canvas corner 
      var LayerWidth = (SB[2].value - SB[0].value);  
      var LayerHeight = (SB[3].value - SB[1].value);  
      marginSize = Margin/100*doc.height.value; // Margin size
      // move resized watermark into the document lower right corner with some margin or lower left
      if  ( BottomLetf) {activeDocument.activeLayer.translate(marginSize,( doc.height.value -marginSize - LayerHeight));}
      else {activeDocument.activeLayer.translate((doc.width.value -marginSize - LayerWidth),( doc.height.value -marginSize - LayerHeight));}
   }
catch(e) { alert(e + ': on line ' + e.line); } // inform user of error  
finally{  
   app.preferences.rulerUnits = strtRulerUnits; // Restore user ruler units  
   app.preferences.typeUnits = strtTypeUnits; // Restore user type units    
   };
}; 
function placeFile(placeFile) {  
    var desc21 = new ActionDescriptor();  
    desc21.putPath( charIDToTypeID('null'), new File(placeFile) );  
    desc21.putEnumerated( charIDToTypeID('FTcs'), charIDToTypeID('QCSt'), charIDToTypeID('Qcsa') );  
    var desc22 = new ActionDescriptor();  
    desc22.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), 0.000000 );  
    desc22.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), 0.000000 );  
    desc21.putObject( charIDToTypeID('Ofst'), charIDToTypeID('Ofst'), desc22 );  
    executeAction( charIDToTypeID('Plc '), desc21, DialogModes.NO );  
};