Wallet (2.1.1) is unlocked, 14 connections, block height is matching with block explorer.
Maybe I should divide my coins to more chunks?
I had a similar problem in the beginning when I hadn't staked anything in the first 13 hours or so. After moving coins around, I finally started PoSPing a couple of hours later. I don't know if this is by design or not (it's possible that older coins still work towards PoS instead of PoSP), and I surely don't swear by it, but it worked for me and some other CBXer.
That's right, this other CBXer had the same problem.
Some of my addresses and subaddresses weren't staking so I tried sending the funds to a new address. 1 hour later problem was fixed.
I posted a guide on page 56 of this thread, it might be worth reading sections 'Checking your addresses and inputs' and 'Consolidating inputs'