Multiple Certifications Adobe Acrobat Pro 2017

[Viivi]

In Adobe Acrobat Pro 2017, I am having trouble adding multiple certification signatures (not simply typed signatures - but digital certifications). Our documents require multiple confirmations of certification by different people, and I have been able to do this before in an older version of acrobat pro. When placing the first certification, I enabled the addition of signatures, but I am unable to select or place an option to add another certification. Any help in determining how to add multiple certifiers would be wonderful.

Thanks,

Viivi

[ratdog]

Is there a secret place in the Adobe Guideline to actually implement functions instead of description.  I am also having difficulty in adding signature blocks.  The guideline is fairly useless.