Are these issue in the forums here, only?
This forum itself (Jive forum software) has specific issues like what you've described (at least double capital at beginning of sentences), especially with iDevies (iPad, iPhone, etc) These issues (at least the double caps) are specific to this forum only.
Are you having these issues elsewhere, besides in this forum? If it's only in this forum, there's nothing that can be done on your end. the forum host have been notified of the issues countless times. It's up to them to make the corrections (which have not been corrected for a long time).