@Eva Fox I had the exact same thing happen with Zillow; it is a shock when you see it but realize it is just a computer algorithm.

Computer algorithms can't give you accurate numbers. look for comparable rentals in your area.

or just Zillow algorithms gone whack?

Been building a algorithm to predict housing price appreciation over the past few months and I think I'm ready to take the plunge and buy some properties. 

Those numbers Zillow provides run through an algorithm and don’t necessary apply to your particular property.

I was a double major in accounting & finance before, realizing a CPA with an MBA makes capped $200,000, CS quant majors doing computer science algorithmic trading can profit heavily, like Ken Griffen quant bond-arbitrager who has a net worth of $9+ billion  and bought the most expensive house (penthouse) in the nation in new york and house in Europe.

Lots of people working on algorithms.

If a unit is vacant and then occupied, the algorithm may assume a month 2 actual read that is lower than the month 1 estimated read shows that the meter has "round tripped" (like a car going to 1 mile on the odometer after 99,999) - although that would be more like $3,000 than $1,000 higher ime.

Not spam, but the algorithm thought otherwise. 

I don't have access to FICO's secret algorithms, but the software we use which was built by folks trying their best to reverse engineer said algorithms, which I've played with extensively, shows the 'sweet spot' at 1% to 14.49% of utilization for credit card accounts, for almost all credit scenarios.