title: Mailchimp INTERESTED merge tag advanced conditions
body: <p>I have read ALL on mailchimp website from all api docs to blog comments :D
  and even talked (chat) with there support.
  Support helped me in some why but nothing i didnt knew :D
  Merge tags have IF and ELSEIF statements and work on OR logic there is NO AND !!!
  A bit blaaahhhhh if you ask me... ;)
  (Mailchimp add AND) XD
  So i have a question if anyone tried this.
  I have one List with 2 Groups 
  (Group title: Categories
  with Group names: language course, IT course, first aid course, cooking course;</p>
  
  <p>Group title: Cities
  with Group names: New York, Washington, Springfield, Texas)</p>
  
  <p>And i want to send campaign to users who have this criteria:
  Categories:IT course
  OR AND
  Cities: New York</p>
  
  <p>i have tried:</p>
  
  <p><pre> <code>
  <em>|INTERESTED:Categories:IT course|</em>
    <em>|INTERESTED:Cities:New York|</em>
      (STEP 1) This text will print only to New York &amp; IT Course Subscribers;
    <em>|END:INTERESTED:|</em>
    This text will print only to IT Course Subscribers;
       BUT if they already are receiving from step ONE (STEP 1)
       This will duplicate the msg
  <em>|END:INTERESTED:|</em></p>
  
  <p>So i tried this:
  <em>|INTERESTED:Categories:IT course|</em>
    <em>|INTERESTED:Cities:New York|</em>
      (STEP 1) This text will print only to New York &amp; IT Course Subscribers;
    <em>|END:INTERESTED:|</em>
  *|ELSE:|*
       BUT this is okey :D but what if they dont have IT course selected
       where will the "Cities:New York" message print ??? SOOO.... next step xD
  <em>|END:INTERESTED:|</em></p>
  
  <p>It should be something like this. Right?
  <em>|INTERESTED:Categories:IT course|</em>
    <em>|INTERESTED:Cities:New York|</em>
      (STEP 1) This text will print only to New York &amp; IT Course Subscribers;
    <em>|END:INTERESTED:|</em>
  *|ELSE:|*
    <em>|INTERESTED:Categories:IT course|</em>
      (STEP 2) This text will print only to IT course Subscribers;
    <em>|END:INTERESTED:|</em>
  *|ELSE:|*
    <em>|INTERESTED:Cities:New York|</em>
      (STEP 3) This text will print only to New York Subscribers;
           and this gets duplicated but it shouldnt even get executed
    <em>|END:INTERESTED:|</em>
  *|END:INTERESTED:|*
  </pre> </code></p>
  
  <p>AND COMPLEX step
  What if i have one Categories and two Cities
  <pre> <code>
  <em>|INTERESTED:Categories:IT course|</em>
    <em>|INTERESTED:Cities:New York, Washington|</em>
      (STEP 1) This text will print only to New York, Washington &amp; IT Course Subscribers;
    <em>|END:INTERESTED:|</em>
  *|END:INTERESTED:|*
  how to do this one ???
  :D</p>
  
  <p></pre> </code></p>
  
  <p>I think this is possible but i cant find any mistakes in nesting.
  I hope you have better idea and NESTING plan ;)</p>
  
  <p>And did anyone tried <em>|IF:|</em> on <em>|INTERESTED:...|</em>
  a have seen in doc. that there is <em>|ELSE|</em> clause but not <em>|IF|</em> nor <em>|ELSEIF|</em> so i asked the support and they told me to try it (my conclusion THEY DONT KNOW) where i was very surprised, so i tried it and of course the syntax is wrong.
  What did i tried?
  few variations:
  this is the right syntax (normal)
  <em>|INTERESTED:...|</em>
  *|END:INTERESTED:|*</p>
  
  <p><em>|INTERESTED:...|</em>
  ...
  <em>|ELSE:|</em>
  ...
  <em>|END:INTERESTED:|</em>
  .
  .
  .</p>
  
  <p>i have tried:
  <em>|IF:INTERESTED:...|</em>
  ...
  <em>|ELSEIF:|</em>
  ...
  <em>|END:INTERESTED:|</em></p>
  
  <p>and</p>
  
  <p><em>|IF:INTERESTED:...|</em>
  ...
  <em>|ELSEIF:|</em>
  ...
  <em>|ENDIF:|</em></p>
  
  <p>because i didnt know what to close INTERESTED merge tag or IF merge tag
  i got some gibberish but i think somethig is wrong.</p>