Makes sure your post screws are tight, common culprit for jumping ohms.
^^^^^^^^
that
after building a coil, the heating and cooling of vaping can loosen the screws, then they need to tighten a bit more.
It is also important to understand that the lower in ohms you want to operate, the more susceptable you are to small fluctuations in ohms at electrical *contact* points.
the contact points i am refering to are the points where electrical contact is made by just *touching*, not soldered and not screwed in under pressure.
For example there are the battery contact points and the 510 centerpin contact points