Are dungeons locked at the level when you first enter them?

I read that dungeons are locked at the level when you first enter them. So let's say I enter a dungeon at level 2 and then later on in the game I do a random quest (the ones you get from the inn keepers) and it sends me back to that dungeon when I am at level 45 (because I have already been to all the dungeons at this point). Will the dungeon level reset at this point with the automatically create quest system?

Solution 1:

A dungeon is set at the level when you first enter, some dungeons however may have a minimum level and if you enter at a level lower then that it is set at its minimum.

An example could be a level 5 character enters a dungeon and all the monsters inside are set at an equivalent level lets say 4-6. That same character could enter another dungeon still at level 5 but it has a minimum level of 10, therefore the monsters are set to what a level 10 would find in a dungeon.

Enemies are reset once a week even in dungeons you have cleared. I am not sure if that alters the dungeons that you have entered and then left.