Problem with Incoming calls by SIP Trunking with Provider

[Online-enterprise]

Hello,

I have a Problem with external incoming SIP Calls from Provider (OXE Rel 9.1 Patch 21)
The Problem, by incoming calls, OXE is reading the INVITE Field, but this is diffrent from the TO field, and there is right number.
For example, OXE is registered as 1234560@123.123.123.123. My numbers are 123456 0-9 (DDI). I think DDI Transcoding works right. Outgoing calls are displayed with the right number (for example 1234561) When I call back this number, calls are routet to 1234560. In the INVITE Field you see INVITE 1234560@123.123.123.123 and in the TO field, you see the right called number TO 1234561@123.123.123.123
Is there anything I can do, that OXE reads the TO field?

Thanks for Help