hi my overall dashcat scores went from 75,85,92 and dipped to 55 .Has anyone else faced this issue ?Kindly help!

Moving from seeing mocks from a 'scoring and not scoring' perspective to one where you just treat it is a way of identifying your mistakes which you otherwise wouldn't have committed in a non - test scenario is a rewarding perspective. It liberates you. I have had many ' Oh crap that could have come right had I read that word', ' Man, if not for that silly mistake I could have cracked 12 marks from this set and gone above 90 in score (new pattern). What 90, I am seeing scope for myself to go even 120 - 125. So these are those realizations that come in the analysis. You know you are worth 120, but today due to these mistakes you are committing, they are holding you at 70. Pick a mistake and bandage it. For me it is reading questions better and understanding it mildly before starting to put pen on paper. For someone else it might be something else. But this perspective of treating my mistakes is helping me focus more on the process than the result. Hell with the percentiles and scores, I am not going to commit that mistake again. Period. The scores am sure will auto-follow. I felt this long-winded post was necessary to put forward my take on this feeling during this phase of preparation, and am sure others might be going through the same too. Putting it down here did help. Thanks for asking. I answered my inner self more than I answered you.

This is very normal don't pay much attention to your score, focus more on the learning part, just try not to repeat the same mistakes.

How shall I improve on Para summary and odd man out questions in last 25 days. Plz tell

The key is to learn everything about paragraphs. Believe me, para jumble, summary, and the odd one out are actually the same thing, the skills need to crack them are the same. Getting better in jumble means you are getting better overall. The best time tested way is to practice more and more. They are more about logic than knowledge of the language. There are lots of quality videos in YT where it shows how toppers and VA freaks approach these questions. Complement practice with these videos(5-6 hours of content)and trust me your VA marks will shoot up. I have been having 90 % accuracy in the VA section compared to 65% last month. Do try it!