You really should only resort to plugins to do such basic things once you can do them manually or you severely limit your understanding of and ability to progress with the software.

But rest assured that this might have nothing to do with the "Dynamics of the component" glued components (and also groups) are created automatically if you draw a closed shape on a surface, without intersecting it's borders and group it or make a component out of it. If you take a moment to look at the component parameters of the "Make Component..." table you'll see it is auto defined as "Glue to Any face"

Whenever you create a component, a definition is kept in the drawing you are using. So deleting all the instances does not delete the definition. Deleting is achieved by purging the drawing via window/model Info/statistics/purge unused. You can, also delete unused components via the component browser by right clicking an item and select from the context menu. Within the file you posted there are unused "corrugated wall, roofrow#2, row#1, Sophie, tp150bit#1" the copied subcomponents of these may interfere with your component and create the effects you are experiencing. this may be the case with the drawing you are inserting the DC into Purging is required.... where you save and insert a DC explains the change in attributes, from your home position on the component browser you can enter the latest updated instance, whereas if you go to the folder where the DC was saved you use the original settings. You may have noticed with a DC which copies itself, many unique components are made, so that purging after many edits would probably be required. I suggest in this case, that one uses groups for the sub_entities so that you don't need to worry about them. Another idea you may consider as you build larger objects which consist of many sub_entities, is a level where you can outer shell, explode and make them one component. This is required for quantity lists, otherwise you end up with lots of useless data (sub entities) which slows the operation down.

@box said: If you open an empty SU file and insert Roof, you will have a component called Roof with a sub-component called Tile inside it. It's actually simpler than I have written it. Yes, that worked! I'm not sure I understand how but I can work on it. It'll come to me eventually. Thanks!

@jql said: You shouldn't use a dynamic component to do that, you should use fredo scale box stretching to target instead. Much more practical and less computer intensive ... This is exactly what I wanted to do. Thanks a lot!

@rich o brien said: that was a bug in 2013. but 2013 M1 fixed it. I already have that version so then what could it be ...?

Exactly the same problem here. Windows XP - SketchUp Pro 2013 Why?!!

It is a great plugin, but you can't always use it, so I hope you learnt how to intersect.