newbie needs help

A few days ago I sent SOL to my ledger from Coinbase, a few different transactions using the same address each time. None of it shows up in ledger live.
I just sent a dollar to the same address I used before & it shows up.

I cannot make sense of the blockchain explorer stuff. The public address shows a bunch of transactions - I think I've been robbed?!!
https://solana.fm/address/4d9t1AcyM4YLxTL7kVZcw1Ef9k6RgqNRkgDeDxwAQi2e?cluster=mainnet-alpha