Yet another tier points question, I'm afraid, but I'm sure someone here will know the answer which I've failed to work out myself.
I'm currently Silver, and will attain Gold if I earn 10 TPs by end of November. Happily, I have two trips planned before then
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I'm assuming that if I fly Upper for the first of these (in September) that I will turn Gold upon completion of the return leg, and that any TPs earned on my second trip in October will then start to count towards Au renewal for the year afterwards.
However, what happens if I fly PE for the September trip leaving me Ag with, say, 4TPs to go. If I then fly Upper for the second trip (10TPs earned) that'll give me my Au, but are the remaining 6TP effectively lost or in that scenario would they also count towards Au renewal for the year afterwards?
Sorry if it's an obvious question, and thanks in advance for any answers!
I'm currently Silver, and will attain Gold if I earn 10 TPs by end of November. Happily, I have two trips planned before then

I'm assuming that if I fly Upper for the first of these (in September) that I will turn Gold upon completion of the return leg, and that any TPs earned on my second trip in October will then start to count towards Au renewal for the year afterwards.
However, what happens if I fly PE for the September trip leaving me Ag with, say, 4TPs to go. If I then fly Upper for the second trip (10TPs earned) that'll give me my Au, but are the remaining 6TP effectively lost or in that scenario would they also count towards Au renewal for the year afterwards?
Sorry if it's an obvious question, and thanks in advance for any answers!