I had a problem with sync. The entries on phone would not sync to desktop. I was using Pimlical on phone in making entries on the calendar, and those entries would sync with the phone google calendar on the phone, but would not sync through to the desktop. I finally figured out that when I created the Pimlical entries, there was an option to elect either sync with my Google account or to PCsync. I was not electing my google account and the default was PCsync. I revised the entries to select my google account and now all is right with the world.
I should have picked up on the fact that the desktop calendar showed two colors of items, and only the red would sync.
My phone is HTC Evo 4G (original)
Hope that helps.