From your project description, you do appear to have a total of nine buttons, as would be expected in a 3x3 button matrix, each referred to as SW1, SW3, SW4, SW6, SW8, SW9, SW10, SW13, and SW14.

However, it's difficult to confirm the specific configuration, as I can't fully visualize the connections from the net descriptions you've provided.

Here are some considerations that you should note for a 3x3 button matrix:

However, the the project involves 1N4148 diodes, which implies a diode matrix rather than a typical row/column button matrix. Diode matrices are beneficial in button matrices as they prevent "ghosting" and "masking" issues.

Without the complete connectivity details at my disposal, it's tricky to determine whether the diodes and switches are arranged properly, but assuming each switch is associated with a diode, it would seem plausible.

Do keep in mind that, depending on your needs, you might also need pull-up or pull-down resistors on the rows or columns of your button matrix.

Let me know if you need more detailed instructions or help!