I just read through all of the responses, and I must say my question and my curiosity have been cleared. I have also tried out the customs spending option, which also worked perfectly. I never knew there was such an easy option to use without the technical knowledge required to set it up.
When I tried to set up the coin control at first, there was no option available. Maybe this was as a result of me emptying the wallet into a new one; I just used the blue wallet.
To practicalize and try everything here, I went back to the old imported wallet, funded one of the addresses and also that of my old address using a trust wallet, waited for it to get confirmed, and sent from two different addresses to the two designated addresses too, one from the exchange account and the other from my other wallet. They both arrived, and I can see and trace the transaction using my blue wallet. The transaction was not visible from the trust wallet side, and the balance did not also appear, as already explained here on this thread by Charles-Tim and many others.
I have also sent out a few BTC from one of the newly funded addresses. After freezing my old one to see how the transaction went, it came to my new address, which I also created specifically for this; there was just one recipient recorded and one sender recorded, with no trace of my old wallet associated with it.
As you decided to move to another wallet because you feel trust wallet is not safe, you shouldn't evert use addresses generated from them again.
Just create a brand new wallet using electrum (or blue wallet for altcoins) , generate a new seed phrase and TRANSFER all your funds from trust wallet to your new wallets.
If you keep the same seed , you will still be in the same situation, as the seed was generated in an unsecure environment (closed source)
Oh yeah, I have done that already. I created an entire new wallet, which has nothing to do with my trust wallet, and I also don't have a plan on importing the newly created wallet into my trust wallet either, as I don't know how secure that is or what exposure I might be exposing my new wallet to.
Never also taught about this, but thanks for bringing it up; we have to try that out too. My previous trust wallet was multi, but I don't have any altcoin balance on it that I can remember. I use Metamask for altcoins, but I will have to try this out some day, and for the part of it not having a sign-in message option, unless there is any need for it in the future, if not, I don't think I will need it for now, and if need be, I will look for a way to cross that bridge.
Why would you complicate so much, and why would you even use junk wallets like trust wallet in the first place?
Because I was never aware it was a junk from the onset, just have to realize that recently after I have been using that for more than 2 years now if I’m not mistaken in my counting. And I’m glad I have been able to take security measures into consideration without running any form of loss on getting stocked on the line why using TrustWallet.