This one is significant because it is PURPOSEFULLY contrasting for you from the other, making known to your subconscious mind to recall consciously that there is Contrast here so very different, and the subconscious minds uses "props" "Puns" and even movie sequences, of things you'll remember in order to draw upon to impinge onto the conscious mind so you'll recall.
2nd Dream: The house represents the collective consciousness we all shared as a family. The bus means she needed to come back into the "realm" as she is away from that realm (the conscious one where we all still are) so it's like taking a vehicle to do this....to visit.
The "raining hard" means our emotions as a family are frayed and very sad ones like a huge rainstorm . This is what prompts her nocturnal visits to you.
It's love that brings her, love of family she once knew and caring that it's so frayed emotionally she senses and knows about.
The reason why she dressed this way, was to "impinge upon your mind in the sleep state, so you would recall this contrast upon awakening", that she too is frayed (clothing she wore), and not upbeat now as before......in other words, she suffers (as the clothes showed), that she cloaks herself in to show you she too suffers in an empathetic manner.
The reason WHY Jessica was in the garage and not in the house is because she is "apart" from the family collective consciousness
but yet in a way, still attached (like an attached garage would be), not where we live, but attached this way.,separate & apart from us.
Grandma wore nice clothing in the 1st dream because she wanted to express that she is happy to see you, and was 'upbeat" in that expression, but no doubt there will now be other dreams for you to decipher coming up. She is starting her vigil because of the love she has for all of us, and is always cognizant of it. Love never dies.