Its been a while since I work in CPT/OPT.  If rules and regulations have not been changed since then, what I know is, you can work full time for 364 days ( less than 365 days) and still eligible for OPT.  However, if you work 365 days or more in CPT, your OPT will be denied.  Based on this, you are eligible for full OPT.  There might be something else going on.  Good luck.