because you make the same mistake like me

if you check the soul market for each buy you take 4 rockets!! check the market again.. it was my mistake.. i was thinking that you take one rocket for one soul... but this is not true...
check :
1 soul = 4 rockets
2 souls = 8 rockets..
so this is actually not a bug..
the link below it's an image but for some reason it's like that :P