I actually resolve it. Well sorry. I didn't notice that the last 2 digits were the frame number and the second couple of digits the seconde. Sorry about that.
Yes, the SMPT TimeCode has confused many. It's Hours;Minutes;Seconds;Frames. Let's say that you have a 30 FPS Clip, when one advances to 00;00;00;29, the next increment is 00;00;01;00.
If one does much crutical work, using the SMPT TimeCode, I strongly suggest that they pick up an SMPT calculator, like SMPT Calc, as trying to use a regular calculator for TimeCode can be daunting.
Good luck, and glad that you figured it out.