iMessage-message from 1 contact 2 devices iPhone 3G

Exactly the same issue here. Anyone got any bright ideas?

Is here name spelled the same on her devices?

For example, does she use Kate on one device and Katherine on another?

Everything needs to be the same.

I have 2 iphone, 1 ipad and 1 macbook and all share imessage fine.....so it will work......

The name is the same on both. Surely it's not device name though, they are both logged in via iCloud. There's only one contact on my phone with all the contact details (email, mob no.) however it splits iMessages and SMS into 2 separate threads which is very frustrating

There is only 1 contact on my iphone for her - this includes all her emails / numbers etc.

I checked the settings on her iphone and icloud it is set to recieve at two addresses on her mobile (her number and icloud email) and 1 address on her ipad (the same icloud email).

There is no seamless link as proposed by Apple's adverts. If she sends me a message from her ipad it only inlcudes the ipad messages. Same from her phone which will be a mix of imessage and standard SMS.

Then when i look at my messages inbox i can see her name in it twice 1 string of conversations from her iphone the other from her ipad.

If i were to create a new message and i select her icloud address rather than the number for imessage it will be recieved on both devices. But if she responds on the iphone the conversation will be iphone to iphone only (even if it is still imessage). If she then sends me a message on ipad it starts a new thread in my inbox leaving me with 2!