reserved word dump submits two jobs

Below are steps fro recreating the issue.
1). take sample numbers in a file.
cat >numbers.txt
12
11
111
21
111
21
ctrl+z

2). upload numbers file to a folder

hdfs dfs -put numbers.txt /user/hdfs/numbers

3). Run below pig latin script

dump = load '/user/hdfs/numbers';
dump dump;

You will see two jobs are submitted after running above code.