I can't see the photo never the less I'll help you with the placement. Keep the Bookshelf in such a way that they are at least 1 feet away from the rear wall, with tweeters at your ear level and a slight toe in. If you like what your hearing then that's its done if not play around with toe in and distance from rear wall and the distance between the two speakers which should not be less than 3 feet ideally.
For the subwoofer keep it away from the room boundaries other wise localisation and frequency node spikes will seep in. Trick is to keep sub away from a room boundary or a corner but in between the two bookshelf speakers on the ground and do a sound check if the low frequency seamlessly blend without giving out its location then you have done it. Play around with it place it at different places and see what suits your taste. Since every room is different so is its accoustics.
Always try and form an equilateral triangle with yourself and the speakers.Its best if the distance from the side wall of one speaker is unequal with the other one. Ask me if you wanna know further.
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I already have my music collections set to 320 kbps mp3 and some itunes m4a....and I always verify with software called "SPEk" to check if they r genuine 320kbps mp3 or not.....I m not been able to understand what u just said regarding positioning of speakers...i m again uploading my computer table pics
to let u know... *www.dropbox.com/s/6amgyl9acw5yytg/cmp table.jpg?dl=0
i have uploaded my table pics in dropbox.