When you type //say $ip mIRC evaluates $ip itself to 10.10.0.2 and then that is what is sent to the IRC server. If other people say they are seeing something else then there are a few possibilities:
1. They're messing with you. (by far the most likely)
2. You have a mIRC script changing your output. (unlikely but possible)
3. Your router has gone mad with power and is performing Network Address Translation in an incredibly bizarre and stupid fashion. (extremely unlikely)
Create a second connection to the server and see what appears to that connection when you type //say $ip from the first one.
Spelling mistakes, grammatical errors, and stupid comments are intentional.
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