Sky's Dad was an old SPD Ranger. Perhaps one of the orginal on Earth. He just had a suit that resembled Wes's suit. But their is no other evidence to suggest that Sky's dad was Wes. Perhaps SPD modeled the Dad's team after Time Force. Similar to how A Squad looked like the Space Rangers.
I can't remember all the episodes with Sky at the top of my head. He was in every episode but I assume you mean the Sky Focus episodes. Go to the main page here. Click on episode guide and then go to the SPD Section. You will see a list of episodes with breif summeries. That should help you find the answer to your question.
http://www.powerrangersonline.org