There is no way for anybody to be sure wethere or not a certain transaction is sitting in viabtc's mempool... It's possible they rejected a perfectly find transaction while at the same time accepting a transaction whose inputs have been used in a double spending transaction.

That being said, both the first and thirth transaction look ok to me, so there's a big chance viabtc will have them in it's mempool, so there's a big chance you can accellerate them if you submit them at exactly the right moment.
The second transaction uses an unconfirmed parent, chances that this transaction is in viabtc's mempool are a little less than the chances for the first and last transaction.

The only advice i can give you is to keep on trying...