Solved: Canvas App Gallery Row Loading in quantities of 100 vs loading all items

What controls whether a Gallery loads only 100 items at a time or everything?

I have a gallery w/ potentially thousands of items based on combobox search filter selections. From documentation and forum posts the Gallery should only load 100 items at a time until you scroll down then another 100 are loaded. As I've been playing around with how to setup my gallery to be filtered in different ways, I've noticed sometimes only 100 items load at a time, but other times the gallery is loading everything which is well beyond 2000 items and it takes forever for the app to update and display correct data in each row.

I haven't noticed a correlation in how I've setup the filtering and Gallery Items (ex collections vs referencing datasource directly w/ filters), is there a way to control or know how Galleries display only 100 items at a time or everything?