Cacti data sources and graphs not created (complex)

Hi,

General / summary:
One of my data queries doesn't work. It's a new one but the same one works on one host and not on another (actually doesn't work on a couple of others tried).
>From initial (as far as I could) analysis - the data query does not create the graph and data sources correctly on the effected host(/hosts) and rrd is not created (nor does poller ever retrieves the data).

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How do I see a log of a new graph creation (from device -> data query), not the poller events (that aren't, there are none).
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Specific:
I've took example of two hosts: "Peach" and "Orange", both trying to add the same generated data queries (from script server) graphs.
It all works well as expected in "Orange", but does not in "Peach"
I've included everything in screenshots (those are temporary internal lab servers so I don't mind) so you'd get the full picture.
The two differences I can see tell between the two are:

1.       "Peach"'s (not working) MVSnew dataquery is significantly larger (150 items, 75 rows) vs. "Orange"'s one (8 items, 4 rows).

2.       Peach has a lot of script server data queires, about 65, vs. very little on Orange.

Attachments:
General:
DataQueriesMvsnew.PNG - shows MVSnew dataquery configuration with its associated graph templates "Active" and "Rate".
DataQueriesMvsnewActive.PNG - shows for example "Active" datasource to graph mapping.

Peach (not working example):
CreatingANewGraphPeach.PNG - shows that indeed the data query works as expected and I get my variables ("MVS name" and "service").
PROBLEM-CreatingANewGraphPeachProblem.PNG - the new graph was not created correctly and did not resolve variables.
PROBLEM-NotCreatedDatasourcePeachOrange.PNG - the datasource was not created correctly, btw the rrd file did not create at all
PROBLEM-NotCreatedPollerCacheEnteriesPeach.PNG - poller cache was not created for this new graph (Cacti's log only shows poller events, where do I see creation problems?)

Orange (working example):
CreatingANewGraphOrange.PNG - with the same exact MVSnew data query, I've created a graph on another host, Orange (here "Rate" example)
CreatingANewGraphOrangeWORKS.PNG - graph created correctly and resolved variable names.
CreatedDatasourceOrange.PNG - datasource created correctly (including rrd file which was never generated in "Peach")
CreatedPollerCacheEnteriesOrange.PNG - relevant poller cache created correctly.

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