Regarding the number of letters. Although it is a painful hoop through which to jump, you should send the number requested by a program if that program has a specific number. For schools that specify "at least" or do not specify, send four letters.
Mayo, for example asks for 2 letters, but is thrilled to receive 4 if you send them.
Hopkins, on the other hand, requires 4 CLINICAL letters, and at least one from someone in Internal Medicine. This is an institutional requirement, not a hoop placed by the orthopaedics department there.
Yes, there are a painful number of hoops, but this will all be over soon enough. Simply do your homework and find out what each program wants to receive.
As for LOR forms, if your school will not go to the trouble of scanning in extra copies of LORs with the specific forms attached, simply have your letter writers send the forms by mail directly. No program will have a problem with this. Many would PREFER the ERAS method, but they will be happy to get the form however it comes.
Regarding a separate CV, whoever was complaining about "having" to do this earlier is frankly crazy. You should mail a paper CV to any program that will let you add it to your record. Some programs do not want to receive these until they have a paper file for you, later in October or November. However, keep in mind that ERAS puts some information that is not all that pertinent, and leaves out some fairly pertinent stuff. A slick, single page CV formatted how you want to format it and presenting the strengths of your experiences is so much more powerful than a lengthy, ugly CAF (2 pages are acceptable only if you truly have a number of publications to list.)