I'm thinking of doing something, but it has to have an even number of steps
Why does it have to be an even number?
I think it's more convenient. You can divide everything more evenly if it's an even number.
It's okay to prefer even numbers in your life, as this can just be a personality quirk.  However, if you are having trouble dealing with events that aren't organized and systematic, you may want to talk to someone who can help you deal with that issue.
I don't get why that would be an issue. Do you think it might be OCD?
Yeah you might have OCD if you are obsessed with counting things, it is also symptoms of other disorders. I think you might be able to get some relief if you get officially diagnosed.