Bottom line is you have tried to install a Siri hack onto an iPhone4S which already has a legitimate copy of Siri on it. Regardless of why you did it, this is quite a serious mistake. You should restore your phone to 5.0.1 and then re-jailbreak with absinthe. Otherwise you could be living with a lot of issues, and with the imminent release of 5.1 you are running out of time if you need to restore and re-jailbreak. After 5.1 is out it won't be possible to do this.
There is no way to get things back to a reliable state on your 4S without restoring and staring again from scratch.