Tile question

[jfkbengals]

Follow up questions...

I had never used pre-mixed grout before, but the salesman gave my girl some pitch about it and she insisted that we were going to use it.

When I was applying it, it was maybe a little thicker than I like it, and it stuck to the tile a little tighter than I would like (requiring more pressure with the sponge to wipe it off), but I did not notice anything unusual in the application. The gaps looked filled and nice.

Now that it is dry, it seems like the gaps are only filled about 7/8 of the way to the top. Is it safe to add more grout on top to fill the remainder? It is a bathroom, so I don't want low spots of standing water.

Second question, the only ever bathroom I have ever tiled, I put grout between the tiles at the tub line, but not between the tile and the tub. There I used a silicone caulk which matched the tile. For the life of me I can't remember where that concept came from, but I did it again in this one. Does it seem like that can create a problem?

Thanks folks!