I've done hundreds of Numerology readings over the years, and almost all of them have errors and contradictions in one form or another. The question is, why is this so, and how can you determine what's true and what's false in your own reading.
The answer lies in the method used to create both Numerology and Astrology readings - something I call slotting.
People are more complex than Nine categories
In Numerology, most values in your chart are reduced to a single whole digit number (1 through 9) and then referred to a table of traits / attributes that correspond to that number. But, nine categories is simply not diverse enough to cover all of the ground of human possibilities. This is particularly true of the primary values in a chart; your Life Path, Birthday, and Goal numbers. To compensate for this, numerology charts will list several traits for each category which are tendencies of people with that value. Most of these traits will be true for you - but some will not.
Note that this is also a problem in Astrology where we're dealing with 12 Sun signs or Moon signs. Twelve slots presents us with the same problem as Nine do. People don't always fit perfectly into one category, and some of the exceptions to the classic traits can make a reading seem completely wrong for that person.
The best example I can think of for this in Numerology readings is the tendency for Life Path (7) Loners to have a strong spiritual potential, and be drawn to the occult. This tendency, though usually very strong in these people can be completely absent, making them question their entire reading.
Filtering out the Truth
What is needed is some interpretation; reading your chart and discerning what's true and what's false. The best method I've found for doing this is to use a form of 'Map Dousing'. Sit down with a printed copy of your Numerology reading, a couple of highlighter pens in different colors, and a small pendulum. Go over your report, marking those things you know to be true in one color, and those you know to be false in another.
When you come across a trait that you're not certain about, use your pendulum in your primary hand, while pointing to the trait on the page with your other hand and ask your subconscious to show you if the trait is true for you or not.
Secret Knowledge Revealed
The most interesting parts of any Numerology reading are those areas where your conscious mind does not immediately know if a trait is true or not. This is where we can learn and grow as a person. Here is where our hidden strengths and weaknesses are revealed to us. And, though someone else can take your report, and use a pendulum to check out unusual details - no one can do as good a job as you can.
