Maybe he does it to distinguish himself from a possibly similarly named Leland R. Lynch, if one exists.
Or he is frustrated about Picard's constant fumbling of his surname. It's not Mr Lynch, it's Mr Teelynch!
I wonder what the modelmakers had in mind when creating the remains of the crashed shuttlecraft. Clearly it is completely unlike Andrew Probert's "soapbar"/Type 7 shuttlecraft, in ways that wouldn't be explained by the modelmakers taking the occasional shortcut. It doesn't even try
to be of that shape or detail, but has detailing of a wholly different kind. Did the modelmakers have a specific shape in mind for the intact craft? Or is the design a random one, due to the model being quickly built out of some sort of preexisting parts?
Of course, the interior is the Type 7 one, but that's only sensible: less variety for pilots to learn, even if the actual craft are completely different. Like Airbus cockpits.