Can somebody here explain to me why does my transaction (51006c6217bffc021c8b8dc0dd46c1b99b75488472c186d6cb2faa26003cd472) is so long to confirm even with high priority? It has been more than 12 hours and not a single confirmation and it's actually not my only transaction that is stuck like that but it's the one with the most fee.
Some other questions that I have would be...
Does that happen often that the network just forget/ignore (or whatever) some transactions like that?
Will they ever be confirmed or do I have to double-spend them? (because I have actually have 12 like that)
Am I crazy or that doesn't make any sense? Because I've never saw the network that slow before for my transactions and that doesn't make any sense.
The first address where the coins are coming from (https://blockchain.info/tx/8b3b082c906e2c30f22118613da7b514540411345318984aef04700bf3b5ab00) should be verified first, which i highly doubt because of the low fee (it is only 225 satoshi fee for that transaction) it this get ever confirmed you will normally receive the funds after this tx.