This shot should answer your question. The Surface low is well SW of the convection. I would guess that shear is the main factor. The convection is being pushed NE of the surface part of the system.

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT TUE AUG 02 2005 (edited~danielw)
ATLANTIC OCEAN...
A 1010 MB SURFACE LOW HAS DEVELOPED OVER THE WESTERN ATLANTIC
NEAR 26N69W. SCATTERED MODERATE TO STRONG CONVECTION IS E OF
THE LOW FROM 26N-31N BETWEEN 66W-70W....
IN THE UPPER LEVELS...
A CYCLONIC CIRCULATION IS OVER THE W ATLANTIC NEAR
26N73W. CYCLONIC FLOW IS N OF 23N BETWEEN 68W-76W. UPPER LEVEL
DIFFLUENCE IS ENHANCING CONVECTION E OF THE CENTER AS MENTIONED
ABOVE WITH THE ASSOCIATED SURFACE LOW.
( 4 degrees of longitude separate the lower and upper levels. That's around 240nm.~danielw)

http://wwwghcc.msfc.nasa.gov/GOES/goeseastconuswv.html