Android Sync Problems (DropBox)

When i sync a Windows PC Version 1.4.18 via DrobBox Sync to Android Version 1.4.11 it seems to sync ALL Entries everytime i start the android programm.
My notebook has about 2000 entries and the sync takes about 5-10 Minutes every start.
When i close the android app, sync starts again.
As i have 2-10 pictures in each note the problem ist, that some data not synced although I have been syncing the software on my Android for more than 2 weeks.Are there any tips how I can solve this?