The MOC allows and encourages Signatures. There is no restriction on the number of Post before one can create a signature. Having one with a quick description of your RV and truck help to get correct answers to any question you might have.
I can see that you have created a Signature. It should be added to any Post you make. F.Y.I here is a link to some help on creating a signature.
https://www.montanaowners.com/forums...ad.php?t=70323 Post #23.
Within that Post is the following information:
Note that there is a setting in your profile options to disable signatures entirely. There is also an option to selectively display a signature on a post as you make it which you can see when using the advanced reply editor.
To check these settings, click on User CP (in the second (thin) brown ribbon above) and then click on "Edit Options" (under the "Setting and Options" category). The resultant screen has the options as shown in the pic below (page down a bit to find it)
I also remember, perhaps wrongly (you can't win them all), some ancient rumor that if you are logged on through your phone and have not selected the full screen (or something) option at the bottom of the main page, any Post will be missing your Sig.
If this doesn't solve the problem, let us know.