Kristen Stewart Dropped $2.2 Million to Live 1.5 Miles from Rob

Just one month after Kristen Stewart and Robert Pattinson allegedly called it quits ... KStew bought a house within monitoring distance of her ex ... a very weird move indeed.

Stewart dropped $2.2 mil on a Los Feliz pad that is just 1.5 miles away from her scorned ex.

RPatz kicked KStew out in July after photos surfaced that showed pretty clearly ... she was banging her married "Snow White" director Rupert Sanders.

Stewart's new home gave her easy access to R.P. -- it's a 5 minute car ride.

If the break-up was real ... her plan may have worked, because KStew and RPatz have been seen TWICE together in L.A. -- once at a local bar and again yesterday in Hollywood.

As for her house, according to Real Estalker it's pretty sweet ... 4-bedrooms, 5-baths, pool, spa, fire pits, sun terrace -- the works.