Some of the essential components are listed with +1 or +2 in the SP column. I am basically just checking that if I add one of these components I get SP back. Seems weird to me and wanted to make sure as the ones with this are often better then the original. Thanks

Got it backwards. A component with an SP cost doesn't increase the SP you have, it increases the SP the ship costs. So a ship that costs 40 SP equipped with an SP 1 component requires you to pay 41 SP to get the ship.

Okay thanks. Thought I had something wrong and was checking