Wildly different transaction amounts when importing MetaMask vs auto sync

So I did the whole auto sync for my Avalanche MetaMask wallet. It reported back 730 transactions, a few minutes later it refreshes and now is only showing 628.

So I tried going to snowtrace and downloading all my transactions into a CSV file. Uploaded it, then Koinly shows that I only have 270 transactions!

Why am I getting such a huge discrepancy between the two methods? And why did my transaction amount go down from 730 to 628 after auto syncing?

Thanks!