I have an integration for POSTING a new record in the CMS model. (the button with form values).
However, I need to PUBLISH it afterwards if I want to see the list updated.
How would I do that, since it needs to be synchronous after the POST ?
Try adding a ?publish=1 query parameter. You can see some examples in the docs: Plasmic CMS - API Reference | Learn Plasmic
ah, thanks for that 
All this is somewhat of a hurdle race. Any step you help me solve leads to an other stumble.
Now I can post/publish and delete a record, but though I can see the actual result on the CMS backend, the data on the page gets updated randomly … Sometimes immediately (very rare), most of the times never …
As an example, I did delete a record, the list did not get updated, so I deleted it a second time but it complained (because record was not in model anymore)
