我认为你的理解是对的，两种说法都可接受。as well as既有介词的功能，也有并列连词的功能。不过，将as well as作为介词似乎更符合英美人的习惯。

1. 将as well as作为介词，其后接动词V-ing形式完全可以的。例如：

She is a talented musician as well as being a photographer. 她不但是摄影师还是个天才的音乐家。《牛津高阶英汉双解词典》

The organization gives help and support to people in need, as well as raising money for local charities.该组织不仅为当地慈善机构筹集资金，而且也为有需要的人提供帮助和支持。《朗文当代英语词典》

2. 但也有人持不同观点，认为as well as是连词，其后所接的动词形式应与前面的谓语对等。如《葛传槼英语惯用法词典》的as词条中的第29条中就有如下观点：

“as well as”是conjunction，不是preposition；如不可说“He asvised me as well as answering my question.”，该把“answering”改作“answered”。“He is a painter, engineer, and poet as well as being a sculptor”里的“being”该删去。

▲ 英语语法网有一篇文章，你可以参考一下：

http://www.yygrammar.com/Article/201608/4906.html