Sorry to read about the lost hours of work, @jdev. Your feedback has been noted by the team; since there’s a lot of new stuff / improvements on the works I think it wouldn’t be too complicated for this warning to get a makeover.
Regarding capitalization – we rely on the metadata coded on publisher sites, which is not always properly formatted. Style code can apply capitalization to anything lowercase but must assume that anything uppercase is a proper noun. Although at the moment there’s no direct way to correct this (besides trying to Auto Update, Shift-A), we will soon be introducing the ability to bulk edit library items and an auto-capitalization tool for titles (as mentioned in this other thread).