In ArcGIS Online, when editing a point feature locating atop a polygon feature, the point feature sometimes inherit the values for the polygon feature rather than the point feature. Changes however still change the point feature.
Unable to reproduce in the September 2016 update. When clicking in that area, it appears that I first select Field Notes (area). I am able to click the arrows at the top of the pop-up to switch to the points layer and attachments is visible there.