Some issues about 'Container Name'

Some issues for 'Container Name"
1. When input 'test_1', it prompts :
Invalid Fields
Container name can only contain letters, numbers, '-' and '_'

That's confusing. it allows or doesn't allow '-' or '_' ?

Check the code, seems the regular expression is wrong.

2. When input 'Test', it also prompts Invalid Fields. OSE only accepts lower cases, so when user input capital letters, web could correct it into lower case automatically