It seems when I call my LTE drops out so I cannot make calls and surf the web at the same time, I am not sure if it's the latest cyanogen build I was running .8 patch. Anyone else experiencing these issues. Or maybe it's a settings somewhere. But I know that there is no problems doing this on stock based roms.
You didn't say, so I'll assume you are using this phone with Verizon. I am a T-Mobile user, so this is all speculation.
GSM carriers can't make voice calls over LTE, unless they have enabled VoLTE in the area and the phone is setup to use it. What happens is that the phone negotiates down to 3G speeds, which are voice capable. I'm wondering if CM11 is using that same mechanic for the Moto X builds, and assuming GSM behavior. Since Verizon doesn't support 3G over GSM, you lose data completely.
Try adding the below line to your /system/build.prop, then reboot into recovery and clear cache.
telephony.lteOnCdmaDevice=1
Cheers!