Just checked mine oblox and the block height is up to date and progressing. I'm no expert but I've had a situation before where I started darkcoind and although it seemed to all start correctly and a grep showed it active on the MN list, the block height was "stuck" and showed no indication it was going to get moving so I simply stopped darkcoind and started it again. On the second start it caught up and continued on without any further hitch. Perhaps you should stop darkcoind on those MNs where it's stuck and restart it.
Good call, stopped it for about 30 seconds and started. Gave it about 10-15 seconds and it was caught up.
My gawd! That's why I don't get paid most of the time. I am willing to bet that's why I seem to go forever without a payment until I gen a new address.....I bet restarting would work just as well. hmmm
I gave up and redid my MN for the 10th time yesterday. Got a payment last night but just looked and my MN was stuck several hundred blocks back just now (and it's always showing all green on the mn site). derp.
I guess I need to constantly stay on top of it. :/
Edit:
drkmn01 Running 101401 70038 160228
My MN was on the (I think) same block as drkmn01 is..... 200+ blocks behind.