Hey @Walter Walter and @Hannah Hanna
Thanks for taking time to go through my issues.
I figured out the issue. (Stupid me)
I upgraded the harddisk from a mechanical to SSD on my laptop a month ago.
The Technician created Two Partions C and D . The Drive D had my old data including Dropbox files.
I downloaded the app and it got installed in Partition C.
I pin down most common excel files on the taskbar and they were linked to the old data on Drive D
So when ever i made changes to the files they were getting updated to D whereas the Drpobox App was in Drive C
Since the Fodlers were the same i couldnt understand why sync was happening only from Mobike2Laptop and not vice versa.
Finally i hot upon trace back your steps. I realised that the problem is occuring since a month and what had chaged was my Harddisk being upgraded. So i checked the File Properties and saw that they were in Drive D whereas My Dropbox App was in Drive C.
copied the data from Drive D to Drive C and deleted the data in Drive D and changed the MS EXcel File Pinnning to Drive C
All sorthed out