Close Date Added to Poll List (default)

Hi:

I have modified list.php from default template to add a column to show close date. It shows NA instead of data. I did same with template 2 and I get the data altough it requires some tweak. For example: closed date = -3 days, = -two weeks ago (when it should be in two weeks.

Url:
http://www.politicaboricua.com/sondeos-politica?limit=10&start=10

I removed code when there are no polls because I was getting a coding error and was not able to fix.

Any tip or help will be appreciated. BTW, I think end poll date logic could be more relevant that date of creation.

Thanks.