Nope...The 788 is an agressive cutter. Depending on the thickness and wood type this will change how you cut. Blades in general tend to favor "drifting" either right or left depending how they were stamped. The teeth protrude a bit to either side depending on the brand. To help with this you can actually "hone" the side of the blade. Using a fine lap or arkansas stone while the saw is running, lightly place the stone against the side of the blade (teeth protruding) and hone down that side.
The other issue as mentioned is blade tension. You shouldn't have any forward or reverse play more than 1/8". I developed an ear so that I can pluck the blade to get a certain tone when it's tensioned properly. I had a an experience today where I was cutting and noticed the blade was was bowing left and right. I happened to look up at the tensioning lever and laughed. I never tensioned the blade...It happens
Another possibility is applying "side pressure" to either side of the work piece while feeding the wood to the blade. This will definitely cause the blade to "run off" track.
Pattern design and cutting line thickness can also affect your cutting (for me anyway) I cannot cut an all black pattern or thick line. For me I find a light gray fill with a black line against the white paper helps me keep on track. I find that a thin line .25 pixel on my patterns helps. The thin line makes you focus more on the line which causes your brain to transfer this information to your hands which in turn can make the minute adjustments needed to stay on line. This is nothing new...If you've ever hunted with a bow or rifle or did any target shooting this comes into play. Pick a spot on the target, not the whole target and you will be much more accurate.