something that i have done myself...
but you are probably not as lightheaded as me...
if you use the "Isolate Objects" command on a point group, it hides all of those points. (or isolates, whichever you pick)
DId you maybe isolate your point groups?
Do you see the little red light bulb in the bottom right side of your screen?
Another thing I have done...
"Master" Object Layers can be assigned to point groups. Did you maybe freeze/off the layer that the "all points" group is on?