Search button places always left

Hi, my problem is easy.

I put Mosets Tree Search on the site, However I saw that Search button goes to left of search field.

I also try default Search module and I saw that when I open search button for this, it also show at left side

I saw that there is Button Position selection at default search module. Right, Left, Top, Bottom.

Bottom shows at bottom
Top Shows at top
Left shows at left
Right shows at LEFT too

moset search button uses template css however I couldnt find the solution.

Sincerely