bluzeyonecat
When I look at the polyphony in TTS it shows up as 2 notes even though Im only playing one.
Polyphony refers to numbers of "voices" played as opposed to number of "notes" played. One note may contain one or more voices. For example, a hardware synth with a 3-oscillator patch being played by one key will be 3 voices. Now with the same patch, play a minor chord of 3 notes and now the total voices used is 9. If you have a hardware synth capable of 20-voice polyphony, then in theory, you are only capable of playing a total of 6 keys at once with aforementioned patch, not considering other factors such as effects, release times (big polyphony-eater!), sub oscillators or note-stealing algorithms.
Roland TTS-1 should be fairly straightforward, but I don't think you have any control over its playback oscillators. The reason for 1+ polyphony could be caused by sample doubling or chorusing to make a better instrument; something done by Roland-Cakewalk to put smiles on our faces. Overall, I wouldn't worry about it.
Worry about your latency issues (

) which I think is caused by the lack of an audio interface. Just to give you some numbers I use with my firewire interface, buffer is MEDIUM and 96 to give a reported latency of 6.5ms. I am in the process of perhaps improving this with a new PCIe firewire card, but still testing as I go on with more complex projects.
Laptops can cause some serious latency issues right off the bat, even without a DAW running. I encourage you to find and download a program called DPC Latency Checker (dpclat.exe). If when running you seed big red bars, you need to figure out what is polling the operating system and dragging it down. I've seen laptops that are horrible in terms of just stand-alone latency issues.