Install Manager showing only 56 items of 371 installed content and 315 ready to download
DIM version 1.1.0.67, Studio version 4.9.4.117.
All items 371 items appear to be visible in the Studio content library.
DIM > Installation > Content is showing the correct path to 'My daz 3d Library'
The DIM log includes
'Processed 56 installed products, totaling 5.1 GB
Product 13517-1:G-Suit, Bodysuit for Genesis is repeated
Processed 234 products with 418 unique product downloads
1 records were repeated product downloads.'
Grateful for any thoughts as to how I can solve this oddity.

Comments
Are you still having trouble?
Have you looked at the "Filter" window (Above the "Installed" tab)? This needs to be cleared if there's anything there.