Multicity has certain dangers.
Priceline and other combine carriers that do not have an agreement between themselves and this can be risky (in case of delay you lose the next flight). Normally PNR has carriers that cooperate (in case they cooperate it is unlikely that the next plane will leave in case of delay). BUT ... sometimes OTAs create their own pnrs. In such cases there is a danger. Try calling the carrier give the pnr and ask them what is the itinerary. Then you will find out. Hope this helps.