You need (as per previous post) w on w (rh gear) and wheel spin up (60 knots I think it is and or reverse selected in certain conditions) to get the actual splr panels past the flt position.
I think you are getting confused between ground spoilers, and auto ground spoilers.
The ground spoilers are actuated when the spoiler lever is pulled to the ground spoiler posn, and the right MLG oleo is compressed. This compression moves a teleflex cable that opens the ground spoiler valve and ports hyd fluid to the ground spoilers. The ground spoilers will only move if this valve is open, and are only UP or DOWN.
Flight spoilers are always active, and can and will go to full travel in flight. On the B737 the flights spoilers are controlled by big mechanical devices in the wheel bay, The spoiler mixer, and the ratio changer. The spoiler mixer is a wonder of 60's design and extremely complicated inside.
Auto ground spoilers operate with aircraft on ground (same valve open) and wheel spin up. They will also operate with thrust reverse selection.
So if the teleflex cable failed in the ground position, you could get ground spoilers in flight, but only if you pull the spoiler handle back passed the flight posn. You would have other failures as well as the ground prox sensors are bolted on top of the ground spoiler selector valve, and controlled by the same cable. You can see this in the right wheel bay.
I have seen this happen. Very embarrassing as it was my mistake!