Vet Gold uniform will not save into additional costume slots.
I went to ESD to get the new Vet. Gold uniform (I am 1000 day vet). I tried to purchase the uniform change. It would not go through with the transaction unless I bought it in the very first uniform slot (the default slot). In other words, it would not save into slots I have purchased via C store.
How to reproduce (If known.)
1- Go to ESD
2- Apply vet gold uniform to character.
3- Purchase uniform in extra uniform slot.
Earth Space Dock, Clothing Vendor.
I have not tried this on the lower ranks of vet uniforms yet.
Homer: (gulps) I suppose you want to probe me. Well, might as well get it over with.
Kang: (disgusted) Stop! We have reached the limits of what rectal probing can teach us.
In other words, it would not save into slots I have purchased via C store.
Are these slots that you purchased on holodeck (before transferring your character to Tribble) or slots that you purchased on Tribble?
If it's the former, then your issue is that your Tribble account does not recognize you as actually having those extra costume slots. All cstore purchases on Tribble are independent of those on Holodeck.