Mita, don't worry, you won't need to use arrays or classes just yet. You can take out some lines of code and it'll work perfectly.

Here's the process:

1) Create new layerStyle
2) Create new pointLayer (for all points)
3) Add pointLayer to map
4) Create new sampleStyle (for several points)
5) Create new point
6) Create pointFeature based on point and sampleStyle
7) Add attributes to pointFeature
8) Add pointFeature to pointLayer

In your code, you jump back to the beginning, and create new layers. Only the last layer (with the last point) is being sent to the SelectControl, so only that one works. Instead, go back to Step 5 to create a new point and add it to the same layer. Or go back to Step 4 if you're changing the style. So you want to have these lines only once, at the beginning:

layerStyle = OpenLayers.Util.extend({}, OpenLayers.Feature.Vector.style['default']);
pointLayer = new OpenLayers.Layer.Vector("Layer Name", {style: layerStyle});
map.addLayer(pointLayer);

And this line is unnecessary (here you add myPoint to pointLayer, before it's made into myPointFeature - that's something we used in the code before we were adding attributes)

pointLayer.addFeatures( [ new OpenLayers.Feature.Vector( myPoint,null,sampleStyle) ] );

Take those out, and it works completely!