Axapta view of view may cause wrong results

When create view in Axapta, an existing view should not be used as data source because it may produce wrong result.
This happen when the originating view has more than one data source in it.
When view is created, Axapta uses the following technique :
- Use the first data source's dataareaid field as the view dataareaid field
- Use the second data source's dataareaid field as the view dataareaid#2 field
When used as a whole, this view will only show the first dataareaid as its dataareaid. Axapta kernel will filter based on dataareaid and dataareaid#2 with the correct company account. This case no problem.

Problem occurs when the view is used in another view, with additonal datasource attached to it.
Using the same rule as above, the new view's dataareaid#2 field will be replaced by the new datasource attached to it, so the original view second data source is no longer filtered by dataareaid. This may lead to a duplicate data when the same data of the original view's second data source exists in more than one company.