The formats of Column A and E don't match.
You can either change column E to match, by selecting the column and going to Data|Text to Columns and simply clicking Finish.
Or account for the difference in the formulas:
e.g.
=VLOOKUP(""&A2,$E$2:$F$2300,2,FALSE)
and
=INDEX($F$2:$F$2300,(MATCH(""&A2,$E$2:$E$2300,0)))
The ""&A2 coerces the A2 to text format to match column E's text format.