Car moves ofline when driving - 1996 Jeep Grand Cherokee

The automatic transmission creeps? is that it?
that means the (brakes are dead) or the engine RPM is too fast.
if engine is cold (was it) the RPM can be and will be very high and will creep. so is it cold, the engine , and how cold, was it at time of creep
and what was the engine RPM.

or does e ofline mean off line or really means stalls.
as in, my engine when off line, like printer. or ?
wild guess there.

this is simple, all A./T have a clutch that has a stall speed
if you exceed that, RPM it does creep, that is how the a/T fluid clutch works. That is why say , when you idle a 800 RPM it dont creep
then you advance the throttle (engine rpm rises) there is a point
that car starts to move, this is the stall speed, threshold.
all normal.
this is why the operators guide has you start the engine brakes on
and trans in park then while holding the brake , you shift to drive
and prevent creeping,,,,,