Which EPG method do you use? mc2xml, PercData, or external XMLTV file?
OK, I see you use EPG123. This "123" thing is suspicious

Can you open one of the xml file you get from EPG123 and examine the channels near the top of the file?
It should look like this:
<tv source-info-name="Rovi" generator-info-name="mc2xml" generator-info-url="mailto:mc2xml@gmail.com">
<channel id="I1.269577223.microsoft.com">
<display-name>1 On D</display-name>
<display-name>1</display-name>
<display-name>On D</display-name>
<display-name>XFINITY On Demand</display-name>
</channel>
<channel id="I2.28458170.microsoft.com">
<display-name>2 WBBM</display-name>
<display-name>2</display-name>
<display-name>WBBM</display-name>
<display-name>CBS</display-name>
</channel>
...
What is the first <display-name> entry for each channel?