Yes, I believe you can remove the "failed password lockout" settings in your global policy, or you can increase the number of failed attempts to a higher number, or you can lower the amount of time a user is locked out, etc.
We have a 15 minute lock-out for every 5 failed password attempts. We do this because of security reasons. Let's say someone is trying to hack into a user account, or someone has a virus or other malware that is trying to hack into someone's account. They get un-locked automatically after 15 minutes.
What are your global policy settings at, and do you have a lot of users that forget their password or something?
Good luck,