Is this a string bet?

[UbinTook]

Unless he brought both hands out at the same time, it is considered two moves( right hand, then left hand) and therefore a string.
If he brings both hand/chips out at the SAME time then no string.

Dealer calling strings is room dependant.

It is arguable that if the rule is posted "string bets are not allowed" then the dealer SHOULD call strings as it is a house rule and should be enforced uniformly by the dealers.