No, not at all. There should be only one or two T3's cropping up. Your downstream power range also looks too wide at 5.7 dBmV. But fixing those won't sort out over-utilisation. That's been caused by VM over-selling so that there's more use than capacity on the local network, and it will only be resolved by significant capacity improvement works.
As things stand, the fault has been outstanding for more than six months, ten maybe eleven "fix" dates have passed with no improvement. The overall delay is a blatant breach of Fairness commitment 4, under which VM should fix problems promptly, and the repeatedly misleading dates are a blatant breach of Fairness commitment 6, that promises fair treatment of customers is at the heart of a provider's culture. If you haven't already, you should raise a formal complaint with VM using the online form in My Virgin Media, and when that is fobbed off or ignored, escalate to the industry arbitration scheme CISAS demanding compensation for the poor service and separately for the ten broken promises from wilfully misleading fix dates.
You may also want to raise this as a complaint with Ofcom (useless bunch, but may as well), your MP, the Communications Consumer Panel, and the Post & Telecoms Policy Research Team at Citizens Advice.
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