Listening volume

For the last couple days I have been typically listening at a lower volume. Typical volume (not peak) is now low to mid 80's (dB). Interestingly, peak still is high 90's maybe 100 dB. Before, I would listen at a typical good 10dB louder average. But peak was only a tad bit higher so I think I was clearly running into dynamic compression.

The real surise is that at these average lower dB levels, my soundstage is better defined in width and depth. Was dynamic compression limiting my soundstage? Anyone else ever run into this? I'm really puzzled by this-