Process Queue only processing one champaign

Dear Support,

New to PHPLIST so far its been good … (so please excuse if my questions are leaning on the easy side)

I have two campaigns in the queue but only the one is been processed how do I get more than one campaign to processed at the same time?

Here is the campaign details :

|Subject|COVID-19 Leveling up Update|
|Entered|21 May 2020 21:19:52|
|From field||

|COVID-19 Leveling up Update|21 May 2020 21:19:52|inprocess
8956 Still to process
Waiting[Check status]

If did set :-

Thank you in advance for any responses.