When you inject esterified gear, it distributes through your adipose tissue (body fat) within a few hours. Then slowly releases into your bloodstream where esterase enzymes remove the ester and leave the base steroid to work it's magic.
The only danger of injecting too much into a muscle or not injecting deep enough is that you get a lump and sore spot. In this case it can take a couple days for the gear to dissipate but it is still not wasted.
Also, if you're using gear that is made at concentrations close to it's maximum solubility, the oil can dissipate and leave crystals of the steroid in your muscle (this is common with test prop, T-400 etc). This is also painful and takes a couple days to fully enter your adipose tissue.