To reproduce:

1) Create a folder on your c drive. Name the folder "Tests"
2) Create a compiled module within the folder. Name the module "comp_mod"
3) Create a main test within the folder. Name the test "test1"
4) Paste the following code within test1 - save the test.

reload(getvar("curr_dir") & "\\comp_mod");

5) Reboot computer.
6) Launch WR, and run test1.

At the first pause, "C:\Tests\" is displayed.
At the second pause, "C:\Tests" is displayed.
Notice how an extra set of backslashes are removed after the reload statement.