Regularly can't see the modified/saved results in the final page

Hi, (below message previously sent 2 days ago without any acknowledgement or trace in History)

Your solution is quite amazing for certain complex layout features, but for some of the basics it can drive you mad and I'm really losing time.

1/ The save behaviour is erratic. I regularly can't see the modified/saved results in the final page in the Wordpress url.
It keeps looping back to a previous version of the edits. Only the preview works in preview mode ... Why ??
Why isn't there simply a foolproof view final page after publish?

2/ I can't see the full image library in the Media library of Wordpress.
Again an erratic behaviour.
On another site it ended up working after a few days (with very slow thumbnail display). In the current site only a few recent images show up. Why?

Again, we are willing to re-organise our production in several sites we design/manage and on a number of new ones, but these issues are just blockers.

Kindly advise. Thanks in advance,
Eric