kittyI think it has to do with resupping, so if in offline or jump servers you have a resupply script running the game will refresh your items and momentarily not keep track of your killstreaks, hence the flicker.
Also use this thread in the future: https://www.teamfortress.tv/19073/hud-editing-short-questions-quick-answers
Ah, yeah you're right, that was it.
And, sure thing :)