First, Dropbox uses a secure connection. TestMy speeds won't apply because acceleration is disabled on secure connections, so it will be a lot slower.
Second, timeouts are due to extreme latency, not speed. The server is waiting for information, assumes it isn't coming, and basically kills the connection. Satellite internet is subject to ~525mS ping times, minimum due to the distance a radio signal has to go from your dish, to the satellite, down to the ground station, and then back.
This can be exacerbated by additional lags in the backbone if your ground station's provider to the internet is CenturyLink (includes Level3 and Qwest), who has been proven to randomly insert 60-second lapses in service.
You may want to try doing a traceroute to Dropbox.com and/or the personal web site to see where the lags in the system are.
Good morning starrylee,
It's been a while since we last heard from you, so we will close this thread. If you still have concerns, please start a new thread and include a detailed explanation so we can better assist you.