It's a long time since I was a learner driver and a lot has changed, like the 6 points and you're out rule. I can answer some of your points here so that should help a bit,
Assuming that you do lose your licence on passing your test (get that clarified by a police officer), you would still have your driving convictions on your licence but the points would most probably disappear. When getting insurance, all insurers ask for details of motoring convictions in at least the last 5 years although they don'y normally load after premiums after 3 years. One exception to this is where a DR conviction is collected and this can affect premiums for anything up to 10 years.
If you do not get to ask a Police Officer then maybe a call to DVLA at Swansea may give you any further info to the first bit of your question.
You're not doing too bad jacol. I had 11 minor endorsements on my licence as a learner driver due to my dodgy motorbike and not wearing a crash helmet!