Email signature problem with iPad Air

Question

I have a signature in my iPad email that is simply my name, a dashed line, then "Sent from my iPad Air".  The problem is when anyone (including me on a different email account) reads an email from my iPad, my name and dashed line are the same font type and size as in the body of my email.  But the last line of my three-line signature, is much larger.  Here's a screenshot:
I have a similar signature in my iPhone 5S but it works just fine.  Here's a screenshot of this signature:
This makes absolutely no sense to me at all.  Both the iPhone 5S and iPad Air have iOS 7, latest updates, and the signatures were typed into the signature box in Settings...not pasted in.  Hopefully, someone has seen this before, but Googling it got me nothing.

Answer 1

No, they're the same.  That's just the way I cut off the screenshot.  I just confirmed that I can can copy/paste my signature into the signature box on my iPad or iPhone and it retains the font, size, etc. of where I copied it from.  It does NOT appear to have retained them, but when I send a test email from the iPad the changed fonts show up.
I'll try clearing the signature box again, though I've done this before, and type in my signature again.  It might work.