MC6 problems with midi drums and synths

Hey guys. Im new to MC6. Bought it yesterday. My problem is when i insert a synth part into one of my songs using insert>soft synth>cakewalk sound centre. Then even when i select another track by using insert>soft synth> cakewalk ts1 suddenly all the midi files and drum loops all sound like they are running through a synth?

Zeano... welcome. 

Tell us about the computer and especially the sound card and driver mode you are using. 

Welcome to the forum.
If you hear MIDI tracks, they are all running through a synth.
If they seem to be playing the same patch, try changing each MIDI track's channel.
The UX1 is the sound card Guitarhacker asked about in your case.
TTS-1 can accept input from up to 16 MIDI tracks; Sound Center needs a new instance of the synth for each MIDI track you want to use it with.

Well, MIDI tracks going to the same synth need to be on different channels. So if you have 1 instance of TTS-1 inserted and you have several MIDI tracks going to it, they should be on different channels or they'll all sound the same.
If you mean you insert 1 instance of TTS-1 and all the tracks you already have change sounds, I don't know what that could be, especially if you didn't go into the MIDI tracks and change their outputs to TTS-1.