From the report Sam posted, this sounds like 2 separate tornadoes, not a satellite vortex type of situation.
I don't know about the same exact location being struck twice on the same day, but I can post this blurb, taken from Tom Grazulis' excellent book,
Significant Tornadoes, 1680-1991 (see:
Tornado Project Online)
Evnet #96
Apr 3 1974
Lawrwence, Morgan, Limestone, Madison Counties, Alabama
28 fatalities, 260 injured
F5
...The funnel passed across Wheeler Lake as a giant waterspout and entered Limestone County on a small peninsula. Here, it leveled a 3/4 mile-wide swath of trees. The reddish soil was dug up and plastered to the trees by the wind.
A nearby mobile home park was damaged on the edge of the tornado, and an injured man was taken to a church. He died half an hour later when the church was destroyed by the second tornado to hit the area (see event #98)...
Event #98:
Apr 3 1974
Limestone, Madison Counties, Alabama; Lincoln County, Tennessee
22 fatalities, 250 injured
F4
Moved NE from just N of the TN River, 8mi SSW of Athens,
just a half mile north of the track of event #96, which passed by a half hour earlier... Tanner, Capshaw, and Harvest were hit by both tornadoes... The tornado produced F3 or F4 damage for its entire path length...
TonyC