Adding related objects to a particular object

I can’t add objects to my new list!
Recently, I have been trying to add objects to a new list in the data console but I have spotted a problem which does not allow me to add all the object I need on that list. Since I have too many objects now, everytime I pass to the next page and update the list, the selected objects which are not on the actual page are removed from the list. I took screenshots to explain myself easier:

  1. ComboSub is the list in which I want to add the new objects PRODUCTOS that I have recently created.
    https://mail.google.com/mail/u/0/?ui=2&ik=fe76007834&view=fimg&th=14c427b4590ab3c8&attid=0.3&disp=emb&realattid=ii_14c3f45cc99b39f2&attbid=ANGjdJ8SGA5XQ2XlSNpFP-RVDNigjuVDcPrVlDG8jZ3zrbpFnwxHDf3FrF7PJOwFgsCY_o6Ov-xU4WFAgDF6L1hBrr3P_mO0NsuJ2dLEXUpiAR-LlyJpZpgkZXP9JcA&sz=w824-h242&ats=1427047236608&rm=14c427b4590ab3c8&zw&atsh=1</img>
  2. Here I select the new objects I want to add to the list. This is a list which already has some other objects.
    https://mail.google.com/mail/u/0/?ui=2&ik=fe76007834&view=fimg&th=14c427b4590ab3c8&attid=0.1&disp=emb&realattid=ii_14c3f4a3dcde2919&attbid=ANGjdJ9nIaoUZh2yg4OVpU1DfFllmBh-Uvb1lTqZQ0GWo5fnxnQdfxSIQeJaORmwioBI8nOuD08i0yQo4dz8aYn-9lKdp4pv_84FxCBK8c7_ewKcJH3yzGoe_F1v3wg&sz=w694-h824&ats=1427047236608&rm=14c427b4590ab3c8&zw&atsh=1</img>
  3. As soon as I change the page, the “Record Selected” counter restarts and only shows the items that I selected in the actual page (Seems like the other items are not selected anymore).
    https://mail.google.com/mail/u/0/?ui=2&ik=fe76007834&view=fimg&th=14c427b4590ab3c8&attid=0.2&disp=emb&realattid=ii_14c4270211a48014&attbid=ANGjdJ-J223hgxjC5IIeIzu7XFKIm0BJ0HxpzyI9rxVzefPzDSNcFUGPbi2ZGIp9RfNF8eDFNz5a8Xwf5RaBys5hl9bZJ_iiA287tZRYmX4tzQfSXcWZ7192E44jMRM&sz=w864-h1028&ats=1427047236608&rm=14c427b4590ab3c8&zw&atsh=1</img>
  4. The new objects are added.
    https://mail.google.com/mail/u/0/?ui=2&ik=fe76007834&view=fimg&th=14c427b4590ab3c8&attid=0.4&disp=emb&realattid=ii_14c4274d926e4342&attbid=ANGjdJ_Rkl-vE-KNJsH8NZLC6hDmZQqqurqLlsrTEePuEwLH0iG67dg30rJYez29OcA_6ZQ-iq3J8xWFvzIi5FpZTlSFQ06_yCmzmIjhl3GP5aWBgL2oFVqHB126xpk&sz=w808-h188&ats=1427047236608&rm=14c427b4590ab3c8&zw&atsh=1</img>
  5. As shown in step 1, these items were previously selected are they are no longer selected. I do need to add several items that are not seen on the main page. As I try to add new items, the previous items are removed so it is really difficult to group them all within a list.
    https://mail.google.com/mail/u/0/?ui=2&ik=fe76007834&view=fimg&th=14c427b4590ab3c8&attid=0.5&disp=emb&realattid=ii_14c42781b8677d26&attbid=ANGjdJ_BtV8ELeEOOVDwXmFEtgGOPY5wDweUefVVThphbLykya7bMjmH4qkD6FIdf3BLdQ6QkOnGVBAiHpN4syZLo6YRmCcPwNWir0m1Az5LZD46x35oN-nT4ZVV2vI&sz=w864-h1028&ats=1427047236608&rm=14c427b4590ab3c8&zw&atsh=1</img>
    Hope this clears everything much more. I would appreciate some help with this.
    Thank you!

PD: The attached files correspond to the image shown in the step just in case you can’t see the images