"...that is just an artificial perception of meaningless marks on rocks..."
Perhaps. Various geologic factors could raise or lower whatever the mark is being made on over time, via subduction for example.
As for the photos, hundreds of meters difference over 25 years seems to be consistent with the rates of glacial movement yielded from a cursory search.
Just because the face of a glacier advances, or more of the glacier is seen from the photography vantage point(s) now than before, does not necessarily mean the volume of the glacier has changed.
Just because distances are relatively long doesn't mean the inspection would not benefit from precise measurements or modeling.
I'm saying the glacier is not everywhere seen. It doesn't seem to me even measured in any dimension by your description, though I could obviously misunderstand given my limited faculties. However without measurement of some kind the notion that it is bigger seems to me lacking gravitas. Maybe it is growing, but maybe your perception could be validly explained using different theory such as glacial motion or even something unknown.
That's a microcosm of my more general posture of uncertainty. The universe is obstinately chaotic, and our minds aren't designed to uncover truth if it's out there at all. Even if they were the limited scope of our existence in scale and time chokes our efforts to gather data to fuel reasoning, setting aside the issue of whether that reasoning is logically sound and valid in the first place.
You have special powers. Looking at glaciers is calming. Your thoughts could cause global warming. Take a deep breath and just look!