So how come my wireless network is on WiGLE? Is that ligal? Who connected to mine?

Will you guys plz answer the questions, I would not care if some one connected to my network to check an email.

Im a Wi Fi newb. have a couple wireless networks around me, that i am able to connect to. If i get a seccond card, can I connect to two wireless networks at the same time, and will that increaese the internet speed? 3, 4, at at time? I have a DSL and i can download at 380 KB sec, if i connect to ...