If they were using correct algorithms for multipliers there wouldn't be any need to fix each payout factor individually. The problem here is that developer is trying to calculate win chance from payout ratio provided, it should be other way around.

I still hope these issues can be fixed, but as I said you guys should have taken down the site and fixed it once and for all just like all others suggested. All you need to look into is your multiplier calculation function and thats it. I have even told you what you're doing wrong there.

p.s. change your house edge to 1% officially and may be you guys will be able to handle this correctly.