I have created 2 tables on one page in lightning app. Data is fetched using apex server side calls. Data is fetched correctly in 2 tables but 
When i Select checkboxes from Table2 checkboxes in Table1 are getting selected This is happening for number of rows that are shown in table1. for example if Table1 has 2 rows then in that case when i check first 2 checkboxes in Table2, Table1 checkboxes are getting selected. HTML for table1 and table2 is mentioned below

TABLE 1
<tbody>
<aura:iteration items="{!v.RPP}" var="RPP11" indexVar="ind"> 
<tr class="slds-hint-parent">

  <td role="gridcell" class="slds-text-align--right" style="width:3.25rem;">
    <span class="slds-checkbox">
      <input type="checkbox" checked="{!v.isChecked}" text="{!RPP11.Id}" name="options" id="{!ind}" 
            onchange="{!c.updateCheckboxes}" aura:id="id1" />
      <label class="slds-checkbox__label" for="{!ind}">
        <span class="slds-checkbox--faux"></span>
        <!--<span class="slds-form-element__label slds-assistive-text">Select item 1</span>-->
      </label>
    </span>
  </td>

  <th scope="row">
    <div class="slds-truncate" >{!RPP11.Category__c}</div>
  </th>
  <td role="gridcell">
    <div class="slds-truncate" title="Discount A">{!RPP11.Price__c}</div>
  </td>
 </tr>
TABLE 2
<tbody>
<aura:iteration items="{!v.staticRPP}" var="RPPStat1" indexVar="xcnt"> 
<tr class="slds-hint-parent">

  <td role="gridcell" class="slds-text-align--right" style="width:3.25rem;">
    <span class="slds-checkbox">
      <input type="checkbox" checked="" text="{!RPPStat1.Id}" name="options1" id="{!xcnt}" aura:id="xid" />
      <label class="slds-checkbox__label" for="{!xcnt}">
        <span class="slds-checkbox--faux"></span>
        <!--<span class="slds-form-element__label slds-assistive-text">Select item 1</span>-->
      </label>
    </span>
  </td>

  <th scope="row">
    <div class="slds-truncate" >{!RPPStat1.ProductCategory__c}</div>
  </th>
  <td role="gridcell">
    <div class="slds-truncate" >{!RPPStat1.Price__c}</div>
  </td>
  <td role="gridcell">
    <div class="slds-truncate" >{!RPPStat1.Id}</div>
  </td>
</tr>