Same option strike different prices

Hi ALL!
Could someone explain to me why some stocks have different option prices for the same strike?
Like for example : PDLI strike 10 has the differnet prices for that strike:
http://quote.morningstar.com/Option/Options.aspx?sLevel=A&ticker=PDLI
What is the reason?

Thank you

 

To make it more confusing for pple like you and me. No actually I asked that not too long ago and i was told those options ARE different, i.e they expire on a different day etc etc but there is a difference. Hopefully someone more knowledgeable will chime in.

 

http://www.optionseducation.org/classes/contract_adjustments/whatyou_01.jsp

 

Ah, ok, so it's split!
Thank you

 

$4.25 cash distribution.

http://www.optionsclearing.com/market/infomemos/2008/apr/24330.pdf