Presets don't stick between El Capitan & Sierra on the same monitor

I have my regular laptop with El Capitan (just before Sierra - I refuse to update until thoroughly tested). I have a test drive with Sierra loaded on it (external SSD drive) and most of my apps, including Chrome / Firefox/ Safari, etc. Have the same extensions in Chrome load. The display is the same 4k Dell display (which is wonderful btw). However, when I switch to a preset with Chrome on Sierra—a regular window size/ position setting I use—the window shrinks down to something small off to the left, not even reflecting any of my presets. Just some random size...