At what point would you consider a number or group to be dead, or have an advantage.
Lets say that you count each number that comes up. When all numbers come up, you reduce the count by 1 for all of them. Continuing in that pattern, you could have 1 number that didn't come up in 400 spins. To cover all numbers on a double zero would be about 10 number each, distributed.
Some numbers will have a count of more than 10 and that one number will have zero.
What range would you consider a number to be bias?
Best way is to run a Chi-Square-Test.
Your counting is biased - definitely.
Let´s say the last number hits at spin 150. And every time it shows you kick it out again.
What if this number awakes as a new favourit and hits 12 times in a row (just to show the mistake) but you keep kicking it out?