@Pert as f2f said: check your HudHealthBonus/DyingStop animation events, on 'reset' they for some reason reposition your health, for something as simple as changing colors you should not be messing with ypos stuff in those animations.
@ yeru: HudMatchStatus for the timer, HudRoundCounter for the counter background
@puoi1 nope, not possible, valve disabled the tf_competitive_mode on local/custom servers
@Koncept: mp_forcewin 1-3 on a local server together with sv_pausable 1 and vgui_drawtree 1 and a pause bind allows you to inspect the winpanel, a hud_reloadscheme and another forcewin to see the changes