Search result won't show Default form for the list

I encountered a problem when crawled search results for list items gave URLs based on their display form but not on the Default one – what is unexpected.

So, I decided to investigate the logics how the search engine defines which of display forms to use for search results.

I found the similar problem described here:

http://go4answers.webhost4life.com/Example/custom-dispformaspx-search-results-100205.aspx

After playing for a while with renaming and created date for the forms available in the list, I came up with the following conclusion:

Search engine takes the OLDERS display form (aspx)  for list items to construct search result URLs.

[The note is humbly provided by http://www.facebook.com/yury.shpakov]