Glad you were able to pick them up. Sorry about the ones you lost. Are the weak ones drinking? With the one with the navel / yolk sack problem, the BYC article recommends cleaning the area with iodine / something similar etc...
Nope, not crazy, call call call... might as well call again and see if they can track the number. Hope they are there but unless the truck is running really late you may not get them until tomorrow... good luck .......
I know they sometimes do come later here, the trucks have been like four hours late at times... think it would depend on how many times a day deliveries are made to your PO from where the chicks are coming from ... I would also consider calling the PO again if you haven't heard anything...