Sending from T1 to T2 or vice versa = No problem in wallet OR Zero explorer
Sending from Z1 to Z2 or vice versa = No problem in wallet OR Zero explorer (They don't appear in zero explorer as per normal since they are Z- addresses)

Sending from T1 to Z1 OR Z2 = minor problem = Wallet shows correct overall balance BUT for some reason a random amount of zero gets transfered to T2(Both wallet addresses are mine). The amount chosen to go to Z1 OR Z2 transfers correctly. The zero explorer shows correct data (shows both tx's)
Example: T1 balance = 2 zero
T1 sends 1 zero to Z1 OR Z2 and although 1 zero gets to Z1 OR Z2 correctly AT THE SAME TIME a random amount (let's say 0.40) goes to T2 automatically.
So now we have
T1 balance = 0.60 zero
Z1 OR Z2 balance = 1 zero
T2 balance = 0.40 zero

Sending from T2 to Z1 OR Z2 = No problem. This is weird though because you would think that the above example would happen here also.

Hope this helps...