How do we stop the logos in our email signatures from getting bigger in emails responses and threads?

How do we stop the logos in our email signatures from getting bigger in emails responses and threads?

We use our logo in our email signatures. We create the signature in Zoho Mail with text then add the logo and resize it as needed. When we send the email everything appears as we want, but on email threads back and forth between the logos blow up to original size or maybe even bigger. Does anyone know how to fix this? I have brought the same to mail support on at least 2 occasions and they tell me that shouldn't happen and kind of just give me the typical wordy Zoho answer/not really an answer. Please see the screen shots below.

#1 Email Signature when I go to compose


#2 How it looks to me after it has been sent


#3 The Monster that returns on a response.