Select Render - but it doesnt recognize my settings

i have 8500 frames to render.
using GPU complete (rtx 2080)
cycles
sampling: 1000, viewport 500
3840x2160px at 100%
frame rate 30

when i select from the drop down either render image/render animation - i get something that comes up looking like evee - where it renders very fast - but without the proper sample (1000) - like it really renders in half a second - it cant be right with cycles and 1000 samples.

any ideas? thanks.