[avfletch]

CO almost certainly has something mediocre and can't call a big bet from you. Isolate BB with all that overlay just waiting to be picked up.

If you can't remember past hands and you're not taking notes then you're playing too many tables.

You probably earn slightly more playing 4 tables rather than 2 but you'll learn so much less and in the long run being able to beat higher stakes is much more important.