It looks like a wing is heavier than the other one... It becomes apparent when flyin' inverted and a wing drops (usually the heavier one), also when looping: the heaviest wing will go farther than the lightest one resulting in sort of a half roll when entering or pulling out the maneuver.

Here are some tips that may help u finding the best CG location: when entering a 45° upside line and half rolling the plane, it shouldn't drop the nose before 15mt. at least, and begin a gentle descent. If the nose drops almost instantly, u're nose heavy (don't expect a dramatic nose drop for a nose heavy plane.)

When flying an straight and level path, roll 1/4. The plane shouldn't neither drop the nose instantly, but start a gradual loss of height.

About the left yaw on vertical lines, it's normal for every plane to experience some gyroscopic efect from the prop. It'll make your plane always yaw left (except when exceeded right thrust). It´s right to apply something about 15-20% right rudder on vertical uplines. More than that u need some more right thrust.

Make sure you move the CG back bit by bit, then try each new CG adjustment. It'll make your plane fly slower, fly comfortably knife edge, & a bit difficult to take out from stalls.

Hope it helps. Forgive any mispellings, not 1st language.

Greetings from México