This might happen due to the stringent scrutiny that is usually done on a separate assessment of your dissertation. Your mistakes may become more glaring and noticeable in a resit dissertation. Thus, it is not worth taking risk this time. A useful approach for you is to take the help of a professional editor who may check whether your resit dissertation needs a review or complete rewriting. Accordingly, he/she may help you improve and polish your dissertation to a level where it becomes flawless in terms of format and language.
It is also important to pay attention to each comment or feedback you have received on your dissertation so the mentioned aspects may be worked upon. If you are taking professional help, then your editor will ensure to consider all such points. He/she will also help you to correct grammar, structure, organization and thought flow in your content. If your resit dissertation requires complete rewriting, then a honed academic writer can help you to develop a document that complies with professional writing standards, as well as linguistic and formatting styles. A professional can also support you on all other aspects of your research work, including statistical data analysis. This will help you deal better with your resit dissertation.