IMHO Hurricane José is a military asset being used to make sure Irma hits her intended targets before it dissipates into the Atlantic.

NRL Tropical Cyclone Page
12L.JOSE, ATCF TRACK,
16:16:29 UTC (Z) ATL
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CHECK OUT THIS TIME MAGAZINE REPORT FROM 2015

Watch This Hypnotizing Video of Rare Twin Typhoons in the Pacific
Tanya Basu | Time
Aug 19, 2015

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[snip]

Prepare to be enthralled: a Japanese satellite has captured twin typhoons—that's Goni on the left, Atsani on the right—swirling simultaneously for the first time since October, 1997...

The twin typhoons are a weather oddity—it's the first time in about 18 years that twin typhoons have been observed.

ODDITY? TAKE A LOOK THIS JULY 2017 REPORT

Taiwan: 128 injured by twin typhoons July 29-30 /update 2
GardaWorld
July 31. 2017
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[snip]

Tropical Storm Haitang, which made landfall near Kaohsiung on Sunday, July 30, exacerbated the effects of Tropical Storm Nesat, which had made landfall in northern Yilan county on Saturday, July 29.

At least 128 people were injured by wind-induced vehicle accidents or air-borne debris during the storms, which resulted in flooding and power outages in southern Taiwan. Over 650,000 households were without electricity over the weekend, with around 28,600 still left without power as of Monday, July 31.

FINALLY: IRMA AND JOSÉ - SEPTEMBER 2017

NOAA Geostationary Satellite Server
http://www.goes.noaa.gov/FULLDISK/GEVS.JPG