Managed Backups not auto deleting per settings

This is not just the above site, but for some reason the managed backups does not auto delete backups per the number I have set. (eg. I have a site set to only hold 2 and I check and there are 6 in storage). This is causing my backups to not be able to push due to lack of capacity. I don't mind buying more storage when needed however I don't need it at the moment if the system were to delete them as it is supposed to. Thanks for any help or guidance on what I may be doing wrong.