Delivered then not delivered on imessage problem.
I currently have the new iphone 5s and have been having issues with imessage. Currently I will send a imessage or a picture and will get the delivered notification and then several seconds later the red not delivered notification. This happens to certain contacts and then not others. Now when I get on my mac or ipad it shows that the message/picture was delivered and I get a normal response. It may be nit picking but i really dislike the failure to send message notifications popping up on my iphone even though i do know my message is actually sent. But when I dont have access to my computer its frustrating trying to guess whether the message was sent or not. Any help or possible solutions would be greatly appreciated.
Thanks.
iPhone 5s, iOS 7.1