No, it's not weird, it's just not painted!!!
If you look closely at the photo, you'll see there is a door there, but CX haven't outlined it, so it blends into the green bachground. With the new colour scheme they have outlined all 5 doors so thats why it appears to have gone from a 4 to a 5 door machine. It was also a practice done by swissair on their old scheme on the B747-300 models. The last door (on the starboard side anyway) wasn't outlined, so it too looked like a 4 door machine, but the 5th was there, just hiding.
Hope this helps!!!!!!
Aircraft I've flown: A300/A310/A320/A321/A330/A340/B727/B732/B733/B734/B735/B738/B741/B742/B744/DC10/MD80/IL62/Bae146/AR