Zacks Investments Having Trouble Making Up its Mind About Aramark

I went into Fidelity's website to research the stock of Aramark, the food services provider.  Under the "News and Events" tab, these were the four most recent items:

Zacks Investment Research, Inc. downgrades ARAMARK from HOLD to SELL. Investars Analyst Actions - private – 12/01/2016

Zacks Investment Research, Inc. upgrades ARAMARK from SELL to HOLD. Investars Analyst Actions - private – 11/30/2016

Zacks Investment Research, Inc. downgrades ARAMARK from HOLD to SELL. Investars Analyst Actions - private – 11/29/2016

Zacks Investment Research, Inc. upgrades ARAMARK from SELL to HOLD. Investars Analyst Actions - private – 11/25/2016  I understand algorithms are driving most of these sites' output, but this is one algorithm that needs some re-writing.  This would be absurd "analysis" for pretty much any equity in the US markets, but Aramark is a low-vol stock to begin with (beta 0.66) and, during the time Zacks was playing tug of war with itself, the stock only moved within a band of less than 5%.  Embarrassing.