Well, I would like to help, but I would need to see this first hand. I can't wrap my head around all the details in the description.
Consider checking out this video:
A quick question: when sleuthing these disparities in FILTER vs. TITLE DATE, do you happen to have any "bookend null values" ?
For example, if a users chooses to look at 4/1/2016 - 5/1/2016 data, and you only have data on 4/22/2016, does the title range only display 4/22/2016?
I might know what's going on under the hood-- but whether or not I can help is another matter!