Welcome to BYH also. Okay, the lump on the holsteins' jaw. I have had some get these lumps, sometimes I think it is due to getting kicked by a cow that I am trying to get them fostered on to since I raise nearly all my calves on nurse cows now. Milk replacer is just too expensive anymore for me to effectively raise calves.
If the calf is just on a bottle, I would still not get too worried over it, but since I have raised many over the years, I don't sweat the small stuff. Sometimes a calf will get a piece of hay or a thorn or anything like that stuck into their skin and it will cause them to get a lump that will usually reach a point and then just burst. Infection, and when it opens up will be puss and all, draining, IF THE CALF IS EATING NORMALLY AND WITH ENTHUSIASM, and seems to not have any other problems, just monitor it and don't get too bent out of shape over it. Lump jaw disease, and other problems like that are not usually a big problem in any baby calves, and are not that common overall. If it gets hot and hard feeling, then it is probably an infection but may need to be opened up by a vet or other knowledgeable cattle person, but seldom do I ever purposely open them up. Once they do start to drain, I will take and wash out with epsom salt or something like that and try to keep it open so it drains and I have been known to re-open one that may seal closed after first draining, but mostly a warn washrag that you rub somewhat vigorously on it will re-open and keep it open enough to drain. Sometimes they will just get reabsorbed and you will just notice that it is getting smaller.
As for the jersey, yes, they do not need as much milk right off the bat. I would feed a quart for a feeding 3 x a day for a day or two and see if that helps to slow it down. As long as the calf still is acting like it wants to nurse, then you are not in crisis mode. I might even try to give it strictly electrolytes for a 24 hour period so it does not dehydrate, then switch to the milk replacer, reduced quantity at a feeding like a qt or 1 1/2 quart at a time. The electrolyte mixture I would give 2 qts if they want it. They make some electrolyte formulas, in a package, that have a "thickening agent" that will gell up in their stomach to slow the speed that it passes through and slow/stop the scours. Have used them with some success on calves with real watery scours. Now one thing to look for is any blood or reddish looking color to the scours. It could mean coccidiosis or some other problem and that needs to be addressed immediately.
One other thing, you may need to make the "concentration"of the milk replacer a little "less", in other words water it down just a little. Jersey milk is of course a higher butterfat than say a holstein, but sometimes I have found that the standard mixing formulas are just a bit too "concentrated "for jersey calves. There is no one set way to do it, but less at a feeding and feeding 3 x a day seems to work better for about the first 2 weeks. Once they are eating/drinking good, then up the quantity per feeding and cut back to 2 x a day. Figure that the calf will be getting about a pint to a quart a feeding from a cow but they will nurse 3 to 6 times a day. Smaller amounts more frequently will keep their stomachs full but not a "glut "all at one time.
and kept him in the barn and brought his momma in daily so he was able to nurse. Gave him a second shot of draxxin about 8-10 days later and then turned him out about a week later with her. He rubbed the patches off which is what they are supposed to do if you don't take them off, and now he has only a small white spot in each eye. I honestly was hoping that he would get enough sight to see shadows and be able to get around fairly decently. This was a definite plus to have him doing so much better. The longer you let it go, the worse it is for the calf. 
