I see a lot more than 3 records my friend 
No harm though, I found the issue.
read.table is good for reading in csv's not xls files, which are complex binaries.
You will need a package, I recommend readxl
install.packages("readxl")       # <-- only need to run this once in your console, not in your script
library(readxl)
readxl::read_xls("Sample_Report__V0100031.xls"  )
# A tibble: 20,776 x 11
   Session_Name_ Trial_Index_ TIMESTAMP LEFT_GAZE_X LEFT_GAZE_Y RIGHT_GAZE_X RIGHT_GAZE_Y RESOLUTION_X RESOLUTION_Y LEFT_INTEREST_A~
   <chr>                <dbl> <chr>     <chr>       <chr>       <chr>        <chr>        <chr>        <chr>        <chr>           
 1 V0100031                 5 1859620,~ 985,90      569,70      950,00       555,20       60,10        60,20        RECTANGLE_INTER~
 2 V0100031                 5 1859621,~ 986,10      569,30      950,00       555,30       60,10        60,20        RECTANGLE_INTER~
 3 V0100031                 5 1859622,~ 986,20      569,20      950,00       555,30       60,10        60,20        RECTANGLE_INTER~
 4 V0100031                 5 1859623,~ 986,30      569,00      949,90       555,40       60,10        60,20        RECTANGLE_INTER~
 5 V0100031                 5 1859624,~ 986,30      568,90      949,80       555,80       60,10        60,20        RECTANGLE_INTER~
 6 V0100031                 5 1859625,~ 986,40      568,80      949,70       556,30       60,10        60,20        RECTANGLE_INTER~
 7 V0100031                 5 1859626,~ 986,50      569,00      949,80       556,70       60,10        60,20        RECTANGLE_INTER~
 8 V0100031                 5 1859627,~ 986,40      569,20      950,00       557,30       60,10        60,20        RECTANGLE_INTER~
 9 V0100031                 5 1859628,~ 986,10      569,50      950,20       558,10       60,10        60,20        RECTANGLE_INTER~
10 V0100031                 5 1859629,~ 985,90      569,60      950,20       558,90       60,10        60,20        RECTANGLE_INTER~
# ... with 20,766 more rows, and 1 more variable: RIGHT_INTEREST_AREA_LABEL <chr>