Looking for Ships name

I am new to this site, so here goes. Is there anyway to find out what ship my ancestors took to the US in 1884? I have been searching in the Digitalarkivet website, Emigrants from Stavanger 1825-1970 and have found them there. Lars Tobiassen (Asko with slash thru it)Aska, b. Aug. 12, 1864 on Mosteroy Island. Antonette Tobiasdatter Aska, b. Jan 12, 1862. More questions here... 1. why are there multiple entries (numbers) for them on the lists? Lars has 3, each with a different Number and Antonette has 5 with different Numbers. 2. Is is possible to find out what the "remarks" are? 3. Looks like their parents, Tobias Olsen Aska & Esther Larsdatter were departing with Antonette in 1884, but then they are shown as departing with Ole Tobiassen Aske (another son) in 1890. I hope you can help me sort some of this out. I don't read/speak Norwegian, so that doesn't help. Thank you in advance. Rhonda