Jorge - In checking your code, you do have a 'v' in each of those fields as a "hidden hint". See code copied from your form:
form wrote:
<div class="fb-input-box">
              <input id="item4_text_1" name="Estado" maxlength="10" required data-hint=""
              autocomplete="off" placeholder="" type="text" />
              <div style="FONT-STYLE: normal; DISPLAY: none; COLOR: #888; FONT-WEIGHT: normal"
              class="fb-hint hidden_hint">
                v
form wrote:
   <div class="fb-input-box">
              <input id="item5_text_1" name="CP" maxlength="10" data-hint="" autocomplete="off"
              placeholder="" type="text" />
              <div style="FONT-STYLE: normal; DISPLAY: none; COLOR: #888; FONT-WEIGHT: normal"
              class="fb-hint hidden_hint">
                v
I can't tell you what "lines" those are on, but if you were to look at the source code you could find them I'm sure. Within the program, I believe that you need to go to "Form Options" and look at the "Hide Hints" options. I would say you should select the fields (in the "Hidden Fields" box) and press the "-" minus sign. Alternatively, you 'may' be able to "unselect" the Hide Hints checkbox (not real sure there).
            
                                    
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