Thread perallelize bug

[xyzzklk]

I use the command medusa -H target.txt -U user.txt -P smallpass.txt -T 1 -t 3 -M ssh to test some hosts. The file target.txt is a file that contains 2 IPs; the file user.txt contains 5 usernames; the file smallpass.txt contains 13 passwords.

I did't add the -L parameter, because I don't want each thread to test a username parallelly. I want all the threads to process an entire username before proceeding, one by one. But, in this instance, after the first username root has been completely tested, the threads changed to be parallel, although i didn't add the -L parameter.

Is this a default setting or a bug? Please help me, thank you very much.