Regarding your question: "about the six-armed Lord Caitanya you gave me (Krishna, Lord Caitanya, and Lord Rama combined.) Why is Lord Caitanya carrying a forked stick? What do the Saivite-like tilakas on His arms signify? And to whom was this form revealed?" The forked stick is a symbol of ekadandi. The Mayavadi sannyasis, they carry ekadanda, one stick. As we Vaisnava sannyasis carry 3 danda, or three sticks, combined together. The one stick is the symbol of understanding oneness. The monists only accept chin matra, there is only one spirit soul; they do not understand the varieties of the spiritual world. And so far our three sticks are concerned, we take it for granted that we have dedicated our life, for Krishna's service in 3 ways, namely, in our body, in our mind, and in our words. Srila Bhaktivinode Thakura has sung in a poetry that my mind, my body, and my home is surrendered unto You. So a Grhastha or householder like you, you are also tridandi. Because you have sacrificed everything, your life, your home, and your child, so you are a tridandi sannyasi, in fact. So continue this attitude seriously and sincerely, so you will be also as good as a sannyasi even though you are in the dress of a Grhastha. The Saivite tilaka is three pundra, 3 lines, on the forehead, in 3 parallel lines. Our tilak udra pundra, they are distinctive marks of different sections. There are two sections of the Vedic followers. Namely, the impersonalists and personalists. So the tilak distinguishes one from the impersonalists. Our udra pundra, Visnu temple, udra pundra means Visnu temple, so we are distinguished from the mayavadis who use the three parallel lines, tripundra.
Udra pundra means