Following the new government regulation on admission and post-UTME. Universities have stopped post-UTME and in most cases those that require the physical presence of students for screening ask questions that have little or nothing to do with their UTME subject requirement. Applicant are scored and weighted based on their grades in O'level and their UTME scores. Those with a sitting have more scores than those with two sittings. Though some universities don't allow two sittings in some courses and if at all it is as allowed, the scores are always very poor.

This is what you must do if you want to increase your chances of gaining admission into the university following the aforementioned guidelines

Since those that did not pass their O'level in flying colours are not given another chance of proving themselves through post-UTME.
You may have to consider re-writing your O'level this year or next and make sure you make A's and B's, C's will not help you out considering the number of applicants you are competing with. And since JAMB UTME is a one time opportunity you must put in all your effort to score perhaps, 220 and above. Remember, OAU and other schools have stopped physical screening-applicants are asked to upload their result online, many other schools to follow up on this next year because it's cheap and easy to conduct and applicant will still pay screening fee. Finally, your documents submitted such as your birth certificate and others should bear your full name correctly, since you will not be there to explain any error found. My one kobo

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It's an information for admission seekers, not for space bookers