The second issue was indeed a bug in the search code. The problem was, that the search filters the results by category after the actual database query. After retrieving 15 results the plugin filtered all of them, because they did not belong to the proper category, so no results were left. I fixed this by increasing the results count to 30 on the general opions panel, so you should see the proper results now.
The new search version (3.0) is coming out very soon (3-5 days), you will have access to it as well on codecanyon – this issue is completely fixed in 3.0 in a different way. (so after upgrading you don't need to worry about this anymore)
Thank you for noticing me about this, and I hope you like the plugin despite this small issue.Best,
If you like my products, don't forget to rate them on codecanyon :)