Point system W vs L in MLB NHL NBA

Can anyone link me to how this works for MLB NBA and NHL?

Just a tad confused.

NBA I wagered on 13 games +500 each, won 9 and lost 4 and I win +2300 ??

NHL I wagered on 9 games +500 each, won 7 and lost 2 and I only win +200 ??

MLB I wagered on 7 games +500 each, won 4 and lost 3 and I'm at -450 ???

Something seems to be really off here.... could be just me but...  can anyone shed some light on this?

FYI - I was 5 W and 2L and won +1350 a few nights back in the NBA. Something ain't right.

Double check the amount you risked on each pick which should be between 100-500 per. Then determine if any of your picks were heavy favorite or underdog in matchup.

When you bet 500 units you get +500 for a win but its -550 for a loss.

And when you bet a heavy favorite (say -350) you get +500 for a win, but its -850 (or so) for a loss.