I can reproduce the same issue in SQL Server 2008 R2. Instance is:
Microsoft SQL Server 2008 R2 (SP2) - 10.50.4033.0 (X64)
Jul 9 2014 16:04:25
Copyright (c) Microsoft Corporation
Enterprise Edition (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1)
Client:
Microsoft SQL Server Management Studio10.50.4033.0
Microsoft Analysis Services Client Tools10.50.4033.0
Microsoft Data Access Components (MDAC)6.1.7601.17514
Microsoft MSXML3.0 4.0 5.0 6.0
Microsoft Internet Explorer9.10.9200.17377
Microsoft .NET Framework2.0.50727.5485
Operating System6.1.7601
Steps to reproduce:
1. Open SQL Server Agent job and in General page click (...)
2. Click Browse to look for the login and select it (click on the checkbox and then OK
3. Back in the Select Login window click OK
4. Throws the error "No object was found with the name "the login", but objects with names containing "the login" were found". Select the login from the list (checkbox) and click OK.