Some search terms (with content) returned no results

Hello. (Sry for bad english)

I installed the plugin on a system that already had custom posts with another search method.

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Issue 01: The new system worked partially. In some search the shortcode combinations of picture result is blank.

The link of the operating system is here: http://itw.com.br/itwchem/produtos-2/ (check ARCHEM option)

I urge this resolution because the site needs to be delivered to the customer in the next days. If you have no solution, I need a refund, as I will get another similar plugin.

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Issue 02: Another problem I noticed is the need to the filter forms dropdowns to dinamicaly filter the terms before click Submit, without the final list search is updated. The reason is that the customer wants that filtering is mandatory, without appearing all items at once.

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Issue 03: How do I get when loading the page, shortcode not call all items, requiring to submit a search filter?

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Issue 04: The link to the searched terms page result on 404 error. EX: http://itw.com.br/itwchem/produtos-2/_sft_marca=rocol

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Thank you!