Question

Hello Rabbi,
I have two questions:
1.
I bought online two 45-watt lamps, and on the website I bought them from it said that this meant 40 watts, and that is also what is written on the invoice, but I received 40-watt lamps. During the inspection I discovered that the lamps I received are not suitable for my needs, either design-wise or functionally, so even if I had received 45-watt lamps, I would probably have returned them.
My question is whether according to Jewish law it is fair to demand from the store owner a full refund including the shipping costs, considering that this was his mistake in the shipment (the difference in wattage), but also my mistake in choosing the right lamp in the first place?
 
Logic says yes, since his mistake is unrelated to my mistake, but I would be happy to hear what Jewish law says about a case like this.
 
2. I printed out the Rabbi's article
"On Duality and Rigidity in the Haredi World (Column 680)"
I noticed that in the article the explicit word "God" appears.
Does this page from the article require genizah?