What you see is no “movie title count” but the number of visible “items”.
If you sort your library By Title, Plex will also display available collections inline with your library content (subject to the respective library/collection configuration). This isn’t the case if you sort the library by anything else.
Most users configure their library to display collections but hide their content. Based on what you shared, it sound like you configured your library to show collections AND their items – in which case I assume you’ve got approx. 650 collections in that library of yours?
The common use case is to sort your library by default by title. For that, Plex considers the collection preferences and displays them in-line if applicable.
When you sort your library by some other attribute, this will ignore collections – which makes sense to me… e.g. if I sort my library by Date Added / Released / … I want to see my movies based on that attribute – it’ll be hard to find anything if you added movies over several years or have movies spanning several decades grouped in that case. Where would you expect a Star Wars collection to show when your library is sorted By Date Released? Based on the 1st release or the last?
Plex provides me the option to display Collections so I don’t understand why I’m forced to see Collections under my Library display when sorted by Title.
You’re not forced to show them inline your library.
You can configure this according to your preferences in the library’s advanced options.
Setting ⋮ > Manage Library > Edit... → Advanced > Collections to Disabled will hide collections from the main library (while still seeing them on the Collections tab and being able to filter for them).
You can override that library preference for individual collections.
That was extremely helpful. I saw that option but misunderstood it. I was under the impression that the Collections → Disable option would turn off the ability to display Collections completely.