Those are terrible signal and quality values. Agree with Luke, you are lucky that anything works. I think that what has happened is the skew angle adjustments on the LNB are not correct probably because the clamp was not tightened properly.
If you want send me a PM and I will respond with how you can go about making some adjustments yourself. Also if you provide me with your location, I will calculate the angles for you.
Easyview, UEC 4T HD PVR, SD PVR, XV
Spare decoders: SD PVR(2), PACE HD PVR 4T, DSD 660, 1110, 1131, Explora 1
2 unmentionable FTA decoders
Win 10 Pro (64-bit) version 1703, build 15063.138
1.2m antenna, 8-way universal LNB, 2x6 MS, FSM permanently connected.
MS Edge 40 with MSEdge HTML 15