The pps side has found 3 blocks since it went up, scoring has not found a block. I was curious as to whether there was a pool problem also so ran the software on the testnet for a bit and all works fine with finding blocks and recognizing whether they are PPS or proportional. I think we just need more hashing power on proportional side.
The word "proportional" is usually reserved to the defective system of using the same score for all shares. What we have here is called score-based.
Maybe you can try being more aggressive with promoting the pool? All the other pools are more or less the same and this is the only one that offers a distinctive advantage, there's no shame in spreading the word.