Very basically:
A paper wallet has an address on it with a private key.
You can import the key and use is normally or some apps will sweep the funds into a new address when you import the key.
Now, in theory it should sweep all the funds less the transaction fee into the new address.
For some reason it swept most of the funds to the new address and left a little change and sent it back to that same address.
Or there was more then 1 input on the original address and the sweep did not sweep all the inputs.
-Dave
A paper wallet has an address on it with a private key.
You can import the key and use is normally or some apps will sweep the funds into a new address when you import the key.
Now, in theory it should sweep all the funds less the transaction fee into the new address.
For some reason it swept most of the funds to the new address and left a little change and sent it back to that same address.
Or there was more then 1 input on the original address and the sweep did not sweep all the inputs.
-Dave
Yes there were multiple deposits thru the years on the address, but why would that matter as they all share the same pub and private key.
I always read that many people lost lots of BTC when they did not do one sweep for the entire balance as the remaining BTC was sent into oblivion.