Betting question

Hey guys, I just have a question I would like answered. Right now I only under stand the Asian handicapping betting if it's (0,-0.5,-1.....)

My site offers 2 at the same time such as - 0.5, - 1....

That being one bet, how does that work considering - 0.5 has its own outcome.. - 1 has its own.   Does it include. - 0.75....

Thank you for you time whoever answers 

lets say you bet $1000 on -0.75 SPAIN

and they won 1-0

meaning you'll win $500 and get your $1000 back

and if they win 2-0 you'll get $1000 and your $1000 back

same goes for -0.25 if you betting spain $1000

if its 0-0 / 1-1

you'll lose $500

Yes I understand the bet when it's - 0.75 and 0.25

But the site 'bet365` has bets listed as - 0.5, - 1 listed as one bet for a certain odd. What's this outcome winning..