The new system doesn't recognize the formatting codes (or didn't translate them correctly). Just one of the warts that came with the software changeover.
You can fix your signature by clicking on "My Account" in the center of the gray bar under the TDS graphics near the top of the page, then click "Edit Signature" on the left side of the page that comes up.
Delete the formatting codes and format it the way you want, using the toolbar that you see when you're composing a post.
__________________
First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version

), AIS,
coolant filter w/"hokum" bracket, regulated return,
heated mirror mod, lighted cupholder, Marinco heater plug-in.
Hard or no-start? Check Here