Hi Mark! While it is absolutely true that some values/colors may indeed sink-in after a day or so, experience has allowed me to adapt without much thought. Granted, there may always be some slight deviations, but these are corrected in subsequent layers. It may seem odd to some, but may later layers are often comprised of attacking larger swaths of surface area–thus ensuring that any “smaller component disparities” (starts and stops over different sittings) are resolved prior to finish.
I don’t utilize any retouch varnish in my process, but I absolutely oil out to contend with sinking in in later layers. You may find this thread helpful on the topic: