I suggest taking a look at your html sanitization settings make sure html isn't allowed in markdown settings.
Next step would be to move the other 2 topics from that category and check if you still see broken markup.
I need couple of minor cosmetic changes in the login page, as given in the image. Will be great if some one can guide me where to make this change.
Though keep in mind that these files may get updated over successive updates of NodeBB.
@julian Thank you. I got it done, yes, I realize during upgrade it may get over written,I hv to do it again.