An AFP values of 15 ng ml that remained the same one year later is important? Inicial abdominal eco and ct showed liver hemangioma. Hep C and B neg.

AFP alone is unrelia. Tumor markers like AFP are not useful tests and are often misleading. So these are not recommended to be done. Now that you have had it done, recheck in one year...If it remains unchanged, you can ignore it as an anomaly, nothing of concern.
Probably fine. An alpha-fetoprotein level which is only slightly elevated and has been stable for a year is probably nothing to worry about, especially when there is not a clear mass by liver imaging. It certainly will still bear observation, but when a cancer is present, alpha fetoprotein is usually much higher than this. Keep tabs on it. Good luck.