T20P My name is showing when someone calls

[alex]

Hi all,
I have a problem with my phone. This might be just a simple setting, but I cannot find out where it is.
If I record a number in the directory, then the name will show in the history if I miss a call from them (which is ok), however, for every other number, my name shows in the history; if I press ok to call them back, it only shows my name... basically I don't know who called me unless I have already recorded their number in the directory!
Help!