Yes, you did miss your seconds.
If you add 38,53 to 46,21, you'll get 84,74. Tgat is close to 85, but it's still 84. So, you'll end up, more than not, with 24 seconds.
To fix it, you need to raise the first timer a little, since that is the one that doesn't interfere with your delay, only with your seconds value. Raise it by 0,30, and you should be ok.
If you add 38,53 to 46,21, you'll get 84,74. Tgat is close to 85, but it's still 84. So, you'll end up, more than not, with 24 seconds.
To fix it, you need to raise the first timer a little, since that is the one that doesn't interfere with your delay, only with your seconds value. Raise it by 0,30, and you should be ok.