I am using Sony Vegas Pro 17 version 17.0.0.284 with simple MP4 files. I was shortening video clips by cutting out parts but whenever I render the project, in the outcome the last one to two seconds before each cut (split) I placed are also gone, which can get annoying especially when there is talking and the last few words are just cut even though they did not appear to be when previewing the video before rendering! The last few seconds of every 'video segment' are gone before the split happens, and this is happening before every split, and I had many of them so the result is a very messy video that is no longer understandable. I have also noticed desynced audio and video in the rendered video even though it is never desynced in the video preview.. what is wrong with my Sony Vegas? This has only been happening for a few days, it never used to be like that. I tried reinstalling it completely, nothing changed.

Thank you for your help in advance.