23 is a number of changes and new experiences. Generally, these are the result of teamwork and creativity.

Because your birth day is the number 23, you have a natural affinity for it. From your question, I perceive you are predisposed to see that number whenever it occurs.

The number 45 or other sets of numbers occur a similar number of times. However, because of your affinity for the number 23 and your expectation to see that number, you notice the other sets of numbers much less frequently.

By the way, your first two Challenge numbers are 2 and 3. A challenge number reveals an area of life you can expect to be a bit of a challenge, perhaps for a very short time and perhaps for longer. How long the challenge lasts depends much on how soon you accept the challenge for what it is and find a way to work with it.

A number 2 challenge is related to with teamwork, personal or professional relationships, cooperation, and/or diplomacy.

A number 3 challenge has is related to creativity/art, social interaction, and/or group dynamics.