what variant do you have? it sounds like you hve flashed the sprint version on a gsm phone or vice versa. the fist part of what you describe is normal(splash screen,entering recovery...), then you should see the recovery menu. the fact that the phone reboots to the OS instead indicates there is a prollem with whatever is in the recovery partition.
The Delivery Guy
If someone has helped you,please click the THANKS button on that post.
Please post questions so others can benefit from the answers.
donate to my device fund