Sometimes the ASYNC service can get blocked up.
If there are some jobs which are not progressing then after a while the other jobs will go into a waiting state.
My advice would be to restart the ASYNC service on the CRM server.
Try to manually restart some of the jobs, if that isn't really doing any good then select all the ones you have created and cancel them. Also look for any which are not completing or are stuck in waiting and try and restart them.
hopefully the above will get the ASYNC service straight.
I have also seen the ASYNC service sort itself out overnight once it has processed the backlog of jobs.
Ben Hosking
Check out my CRM Blog
Linked-In Profile
Follow Me on Twitter!