unfortunately as for any masternode (not only 3DC) the rule is that if every time you give a new start from the control wallet you have to get back in line and wait like the first time (for 3DC about 6 days currently for the first reward because there are so many masternodes, about 3100 currently), but you must be careful that the wallet message is correct ... not always when you see "new start required" is actually required ... so I suggest you read this topic for the problem of the "mncache.dat" file that often it must be eliminated before opening the wallet to avoid false positives:

https://3dctalk.net/topic/1147/mncache-dat-file-unofficial-guide-to-create-a-simple-bat-file-for-windows-that-removes-automatically-the-mncache-dat-file-before-starting-the-3dcoin-core-qt-wallet-for-masternode-owners-basic-guide

Also before doing a restart and wait about 6 days it is always advisable to do the following checks:

In the VPS (terminal / Putty) :

3dcoin-cli mnsync status

the good result is:

 "AssetID": 999,
  "AssetName": "MASTERNODE_SYNC_FINISHED",
"AssetStartTime": (some numbers here),
  "Attempt": 0,
  "IsBlockchainSynced": true,
  "IsMasternodeListSynced": true,
  "IsWinnersListSynced": true,
  "IsSynced": true,
  "IsFailed": false

3dcoin-cli masternode debug

(the good result is "Masternode successfully started")

Try this in your VPS and check if is in sync with latest block in 3DCoin explorer https://3dcstats.net/

3dcoin-cli getblockcount

Other important check:

3dcoin-cli getbestblockhash

The output must be the same of the output of this command (in your VPS)

curl -s https://3dcstats.net/insight-api/status?q=getBestBlockHash

or the same output of (in your browser)
https://3dcstats.net/insight-api/status?q=getBestBlockHash