Does the SM-BBR60 bottom bracket come in 68 and 70mm widths? I ordered an Italian threaded bottom bracket, model number  SM-BBR60. The box has two check boxes, one for 68mm and one for 70mm. The 70 mm is checked. 

My bike has a 68mm bottom bracket shell. Everywhere I look shows this model as only one size. But the checkboxes?

Does this bottom bracket come in two sizes? And is 70mm useless to me?
I did a web search with the model number, and the first hit is to Shimano product page that says that the bottom bracket comes in 68mm and 70mm widths. That, and the fact that your bottom bracket is marked as 70mm, suggests that the bottom bracket indeed comes in two sizes. If you are still unsure, you can use a ruler to measure the actual BB.

The 70mm model is useless to you. If it was sold to you as 68mm model, you should be able to return it. Even if you mistakenly bought the wrong model, you should still be able to replace it.