The components which are getting published through Finish Editing has multimedia comp links.
Issue #1 - I am not sure why publishing is happening dynamically for some components and not all as I can see the small blue symbol on the published component. Due to this it's appending the tcmid of the multimedia comp to the images title due to dynamic publishing .
Issue #2 - Since the images now has the tcmid it's not rendering on the page as the in the code it's fetched normally.
addBinary()mentioned below). See Frank van Puffelen's Binary Event Tracker articlefor the difference. In terms of the appended ID, that sounds like behavior from before R5.3, I'm not sure but could it be a really old template in the system?