Float error corrections on UV offset

Questions
1

I have a scene where the UV is offset in one direction for the entirety of the scene. Left the scene on last night came back this morning and saw the most distorted mess of a texture I have seen in a long time.

Anyway to prevent float bloat in this situation? I guess I could do like tan(time) or something like that to keep resetting the value to 0

2 
function triangle(t, ratio) {
	    t%=1
        if (t < 0) t += 1

        if (ratio == 0.5 || ratio == null) {
            if (t > 0.5) t = 1 - t;
            return 1 - 4 * t;
        }

        if (ratio == 1) {
            return 1 - 2*t
        }

        if (ratio == 0) {
            return -1 + 2*t
        }

        if (t < ratio) {
            return 1 - 2*t/ratio
        }
        else {
            return -1 + 2*(t-ratio)/(1-ratio)
        }
    }

offset it by a sawtooth waveform duhhh andy…

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