About signature

I'm not a professional, but I do everything I can to make sure that there is no other paper under the one to be signed, from credit card payments for everyday meals, to important passport application documents. If it is in a stapled document, the pages behind it will also be reversed. The purpose is to prevent the pen pressure from having the opportunity to leave marks on other papers.

This is an imitation of the first boss at work, and it is still used today. He thought that this would greatly reduce the chance of someone stealing his signature and doing bad things, but later bosses all thought I was too worrying.

After watching this YouTube video about Nina's will, I thought of a scenario condition I have never faced before:

 In a similar case, a page in a stapled document required the signatures of three people (including me), but all three signed at different times and places. If only I reverse the back page to sign, so that the back paper only has the pen pressure marks of the other two people, will this cause any problems?

Can someone enlighten me if I am doing it right?