So, what I ended up doing was Changing the transaction fees, it's Method: ETA and I changed the target to within 5 blocks (or as you said fish, 122.8 sat/byte), to
within 10 blocks (75.4 sat/byte) and it seemed to go through..
Yep, and you were lucky too, your transaction already have one confirmation.
And maybe now my point 2 makes more sense: current best fee has dropped. I've seen it 76 and now 84 (and rising again).
However, if i'm understanding you correctly Neurotic fish, by changing that I may have just made the sending of my btc confirmation way longer than instant?
It depends. It always depends. The transactions are confirmed by adding them into newly mined blocks. The blocks have limited size and the ones paying more will get in first.
I'll exaggerate a little but:
If you pay 1000 sat/byte because that was the estimation for "within 5 blocks" and until the next mined block many others pay 2000 sat/byte, your transaction will fall behind and may still take long.
If you pay 100 sat/byte although the estimation for "within 5 blocks" was 1000 sat/byte, it can happen that your transaction can get confirmed in the next 30 minutes (many blocks mined unusually quick and not many new transactions with big fee).
Of course, these are extremes and usually the estimation made by the wallet is not that bad. But if you go
much lower than the estimation you can face bad surprises (like not confirmed for weeks). It didn't happen (much) lately, but it was a reality in 2017.
If i'm deducing this properly, the transaction fee was more than 9$? And by changing that target to 10 blocks instead of "Within 5" that my btc may take longer to confirm, if they do at all??
From what I see you've paid now ~2.20$ as fee. Maybe 9$ was the initially proposed fee? Also 1.52$ have returned to another address of yours.
About the number of blocks, as I said, it's an estimation. If the number of new transactions rises or stay constant, it'll be longer to confirm. If it rises (sometimes exponentially) for long time (2 weeks), it will never get confirmed. If it decreases, it'll get confirmed earlier than the estimation. There are 2 unknown parts in the equation: the rate of the new transactions coming and the rate of the new blocks coming (the rate of the new blocks is supposed to be constant, but it's not; miners are instructed every 2 weeks adjust to keep it more or less constant)