Ola Hallengren Scripts and Maintenance Plan Editor – How to execute sequentially on completion

I'm using Ola Hallengren's scripts to perform maintenance on my databases. In the Maintenance Plan Designer I am trying to setup a plan that works step by step, but no matter what I try everything gets executed at one time.

My first and second attempts, left column in the photo, was to use "execute job" and call each job in the order I want. The first constraint was "success" but all jobs execute at once. So I tried "completion" next. Same result. I then constructed the same tree using execute t-sql instead of execute job using this code:

GO
EXEC msdb.dbo.sp_start_job @job_name ='DatabaseIntegrityCheck - USER_DATABASES';
GO

One again I got the same result, everything executes at the same time. I even tried adding a @return_value for executing sp_start_job but that did nothing either. Finally I tried one script like this:

GO
EXEC msdb.dbo.sp_start_job @job_name ='DatabaseIntegrityCheck - USER_DATABASES';
GO
EXEC msdb.dbo.sp_start_job @job_name ='DatabaseIntegrityCheck - SYSTEM_DATABASES';
GO
EXEC msdb.dbo.sp_start_job @job_name ='IndexOptimize - USER_DATABASES';
GO
EXEC msdb.dbo.sp_start_job @job_name ='DatabaseBackup - USER_DATABASES - FULL';
GO
EXEC msdb.dbo.sp_start_job @job_name ='DatabaseBackup - SYSTEM_DATABASES - FULL';
GO
EXEC msdb.dbo.sp_start_job @job_name ='DatabaseBackup - USER_DATABASES - LOG';
GO

And it also executes everything at once. Besides scheduling them one by one in the maintenance plan editor at different times, is there any way I can make them execute one after another. I'm not concerned if they succeed or not, I just want one to run then the next instead of everything at once.