PDF is filled, signed, and completed but responses are not where the fields were placed.

Sometimes when I upload a document to sign myself, upload a document to send for someone else to sign, or create a template and send it out for signature, the ending results are completely unusable. I will place field in certain locations on the document (name, address, date, signature, etc.), assigned it to a person, make sure it is required, and send it off for signature. Other times, I will upload a document for myself and use the writing, check mark, and signature tools to complete. When the person receives it, they are prompted to fill in their responses and sign the document as normal with everything in the right places. When I fill out the document, everything is in the right places. Once the document is submitted, all of a sudden the pdf shows the text, check mark, and signature responses on random locations on the page or pages. Often, it is inside of the actual words of the document. I have not been able to find a solution to this issue and have not noticed a pattern between when it happens and when it doesn't. Help would be much appreciated. There is an important document I need to send for signature right now and I can not get it to work properly.