kcrooks:
You are correct, since, according to your last post, it seems that you have more than a lateral balance problem.
If you need to trim the ailerons to the right is because you have a force trying to roll your model to the left for zero trim.
Hence, adding weight to the left side will worsen things.
You need to perform a full trim to your model.
However, start with a static pitch and lateral balance, as explained above.
Use any of the trim charts that can be found on-line, adjusting it to your type of model.
See example following the link:
http://www.lferc.com/Tips/trim_chart.php