Florida Statute 720.306.8 says:
(8) PROXY VOTING.--The members have the right, unless otherwise provided in this subsection or in the governing documents, to vote in person or by proxy. To be valid, a proxy must be dated, must state the date, time, and place of the meeting for which it was given, and must be signed by the authorized person who executed the proxy. A proxy is effective only for the specific meeting for which it was originally given, as the meeting may lawfully be adjourned and reconvened from time to time, and automatically expires 90 days after the date of the meeting for which it was originally given. A proxy is revocable at any time at the pleasure of the person who executes it. If the proxy form expressly so provides, any proxy holder may appoint, in writing, a substitute to act in his or her place. Do the proxies contain all of this?
The legal dictionary at lawyers.com says:
Proxy
Definition - Noun
[Middle English procucie, contraction of procuracie, from Anglo-French, from Medieval Latin procuratia, alteration of Latin procuratio appointment of another as one's agent]
1 : the act or practice of a person serving as an authorized agent or substitute for another used esp. in the phrase by proxy
2 a : authority or power to act for another
b : a statement or document giving such authorization
specif
: an oral consent or written document (as a power of attorney) given by a stockholder to a specified person or persons to vote corporate stock
3 a : a person authorized to act or make decisions for another
b : something serving to replace or substitute for another thing
Pronunciation'präk-sE http://research.lawyers.com/glossary/proxy.html
While I think your community manager is self serving I think they have a right to the proxies. However, if I was you I would go out and get as many proxies as you can and if possible invalidate hers. You can also talk to the person who granted the proxy and get them to rescind it. Either way I would get rid of the community manager when it was over and done with.